(svn r3022) -feature: [OSX] OSX now uses quicktime to play midi files
this eliminates the long pauses between songs and the "leaving process hehind" bug (moebius_)

(svn r2921) -Codechange: moved all AI-code to 1 central place (ai/ai.c)
-Fix: removed the ability for the oldAI to cheat (this will criple him somewhat)
-Add: base-code for many improvements to come in the AI-system
-Add: added base-code for multiplayer AIs (DOES NOT WORK YET!)

(svn r2882) Some fixes for MorphOS (by tokai)
- Don't track dependencies on system headers
- Add an include path
- Silence a warning regarding a bad signal prototype
- Remove executable flag from pictures
- Add proper OTTD icon

(svn r2866) Move all functions and tables which aren't directly involved in managing the sprite heap to a new file gfxinit.c.
This doesn't ease the global variable mess, but makes the distinction between sprite heap and gfx loading routines easier.

(svn r2841) Pimp the Makefile: Determining the header dependencies is now a separate step.
This should fix the dependency related problems and reduce the number of recompiled files when table/strings.h changes

(svn r2756) Renamed railtypes into _railtypes
Renamed railtypes.c into railtypes.h, all other tables are in .h files. (It should be in the tables dir but I couldn't figure out how to get it there without deleting it first).
Added const and extern.

(svn r2712) Overhaul DirectMusic MIDI backend:
- Merge the .c and .cpp part into one file
- Properly deinitialize at the end
- Remove "experimental" status
- Miscellaneous smaller changes
-Fix: Volume control works now

(svn r2703) - Feature: [OSX] Added a native alert window to show whatever error() needs to print (Tobin made this, while I fixed some issued in it)
- As a bonus, we now have an objective C file (os/macosx/macos.m) to use the functions Apple made to interact with OS stuff

(svn r2685) -Codechange: Split the music/sound/video drivers into separate files and move them into subfolders.
This results in shorter and hopefully easier to maintain files.
Note: I had to change paths in #include statements of some unrelated files, because I added the ottd base directory to the include path (-I.)

(svn r2606) -Codechange: renamed ai.c to ai_old.c, and ai.h to ai_new.h to make room
for a global AI-handler

(svn r2542) -Add: [GPMI] Added GPMI (http://sourceforge.net/projects/libgpmi/)
support to OpenTTD in preperation of AIScripts (long term). It is OFF
by default. Add GPMI:=1 to Makefile.config to enable.

(svn r2516) - Feature: [pbs] Implement path-based-signalling. This allows multiple trains within the same signal block, provided their paths dont intersect. For this the block must have all exit and entry signals be pbs signals. Place these by ctrl-clicking 4 times on a normal signal.
- Feature: [pbs] Implement autoplacement of pbs blocks, when a block has an entry and an exit pbs signal, covert the entire block to pbs. Can be turned off in the patch settings.
- Feature: [pbs] Allow showing of reserved status by making the tracks darker, when the pbs debug level is at least 1.

(svn r2491) -Fix: Solved a performance problem introduced in r2467. While busy
committing, restore the sort order in the Makefile

(svn r2461) -Feature [Makefile] libpng-config can now be called something else in Makefile.config
useful if you for some reason got a libpng-config, which is called something else

(svn r2448) General cleanup of rail related code, more to follow.
* Add: rail.[ch] for rail-related enums and wrapper functions.
* Codechange: Removed dozens of magic numbers with below enums.
* Codechange: Rewrote CheckTrackCombination().
* Add: TILE_SIZE, TILE_PIXELS and TILE_HEIGHT constants.
* Add: enums RailTileType, RailTileSubtype, SignalType to mask against the map arrays.
* Add: enums Track, TrackBits, Trackdir, TrackdirBits for railway track data. (Note that the old RAIL_BIT constants are replaced by TRACK_BIT ones).
* Add: enums Direction and DiagDirection
* Codechange: Moved a bunch of track(dir) related lookup arrays from npf.[ch] to rail.[ch].
* Codechange: move RailType enum from tile.h to rail.h.
* Add: Wrapper functions for masking signal status in the map arrays: SignalAlongTrackdir, SignalAgainstTrackdir and SignalOnTrack.
* Add: Wrapper functions to access rail tiles, using above enums
* Add: Wrapper functions to modify tracks, trackdirs, directions, etc.
* Add: Wrapper functions for all lookup arrays in rail.[ch] (Arrays are still used in parts of the code)
* Codechange: Renamed some variables and arguments to better represent what they contain (railbit -> track, bits -> trackdirbits, etc.).
* Codechange: Don't use FindLandscapeHeight() in CmdRemoveSingleRail(), since it returns way too much info. Use GetTileSlope() instead.
* Codechange: [NPF] Removed some unused globals and code from npf.c.

(svn r2371) - Fix: [ 1144510 ] make install tries to install scenarios in the (non-existing) personal dir when USE_HOMEDIR is specified.
This fix solves the issue for now by installing scenarios in the system-wide data dir.
- Add: 32x32 xpm format icon, used for debian packaging.
- Some minor updates to the os/debian directory.

(svn r2225) -Fix: split the endian-detection to target/host. Now cross-compiling
on i386-linux for MacOSX should also work for the language-files (strgen issues)

(svn r2197) -fix [Makefile]: SDL_CONFIG from makefile.config is now not always overwritten
-fix [OSX]: fixed issue where OSX could not compile the java MIDI app if SHOW_WARNINGS was on (introduced in r1917)
-fix [OSX]: the midi class file is now also deleted with make clear

(svn r2196) -Change: updated the Makefile, now it works for crossplatform compiling
(and distcc compiling via Makefile.config). Wiki is coming up soon! Big
tnx to Bjarni and Lucaspiller.

(svn r2046) -Codechange: moved all waypoint code to waypoint.c/waypoint.h
-Codechange: rewrote some functions while moving waypoint-stuff
-Add: added support for 64k waypoints
-Fix: made the waypoint struct a bit more logic (no bit-fucking)

(svn r1917) - Makefile: Revamped VERBOSE support, build mechanics changed.
- VERBOSE has now greater effect, many previously hidden commands
are now shown on the terminal as they are executed. (Use $(Q)
instead of @ where the command should be shown if VERBOSE.)
- Compilation commands redundancy was eliminated.
- Compilation commands calling generalized so that the VERBOSE
support does not further entangle the code. The commands are now
all at a single place, before the targets in a "Build commands"
section.

Note that this changeset has a character of proposal. If you do not
like the direction it takes at all, feel free to revert it (probably
together with the previous VERBOSE patch). However, I believe it
improves the code by bringing the compilation commands to a single
place and it greatly improves the VERBOSE support, too (and makes it
much less intrusive).

(svn r1817) -Codechange: Moved depot-functions to depot.c
-Codechange: Added wrappers around depot-access (GetDepot no exists)
-Codechange: Made depot-functions a bit more logic (no longer
GetDepotByTile crashes your game when you request it on a non-depot tile)
-Add: made depots dynamic (yes, 64k depots are possible now)

(svn r1792) Revert r1761 and set fallback values via ?= for CC and CXX as there seem to be platforms (MorphOS) out there which don't provide some proper defaults.
Use gcc and g++ as defaults, because cc and c++ aren't available either. *sigh*

(svn r1761) Don't set CC and CXX
If somebody tried to use alternate compilers via an environment variable the assignment in the Makefile simply overwrote that.

(svn r1751) - Feature: New PathFinder (NPF).
- Supports trains, road vehicles and ships.
- Uses A* pathfinding (same codebase as the new ai).
- Currently unlimited search depth, so might perform badly on large maps/networks (especially ships).
- Will always find a route if there is one.
- Allows custom penalties for obstacles to be set in openttd.cfg (npf_ values).
- With NPF enabled, ships can have orders that are very far apart. Be careful, this will break (ships get lost) when the old pathfinder is used again.
- Feature: Disabling 90 degree turns for trains and ships.
- Requires NPF to be enabled.
- Ships and trains can no longer make weird 90 degree turns on tile borders.
- Codechange: Removed table/directions.h.
- table/directions.h contained ugly static tables but was included more than once. The tables, along with a few new ones are in npf.[ch] now. Better suggestions for a location?
- Fix: Binary heap in queue.c did not allocate enough space, resulting in a segfault.
- Codechange: Rewritten FindFirstBit2x64, added KillFirstBit2x64.
- Codechange: Introduced constant INVALID_TILE, to replace the usage of 0 as an invalid tile. Also replaces TILE_WRAPPED.
- Codechange: Moved TileAddWrap() to map.[ch]
- Add TileIndexDiffCByDir(), TileIndexDiffCByDir().
- Codechange: Moved IsTrainStationTile() to station.h
- Add: IsRoadStationTile() and GetRoadStationDir().

(svn r1672) Simplify dependency tracking and actually implement it for C++ files, too.
Note: Do "make clean" to get rid of the old dependency files

(svn r1665) Remove VERBOSE flag, because it was only partially implemented
Add "info" target instead, which prints out some relevant variables used in the Makefile

(svn r1619) Fight bit rot in the Makefile:
- Begin all echos with ===> to visually emphasise them
- Add @ to suppress printing of commands where it was missing
- Add echos to rules where none were
- Rephrase some existing echos
- Remove VERBOSE_FILTER, because piping errors to /dev/null is ... a bad idea

(svn r1616) Introduce ttd_strlcat() and use it to de-uglify some piece of code in misc_cmd.
While here rename the len parameter of ttd_strlcpy() to size, because it is a buffer size and not a string length.
Also add -Wwrite-strings to the Makefile, because the above mentioned piece of code was the only part which triggered this warning.