(svn r2473) - Add: VehicleMayEnterTile(), which checks if the tile owner of a tile is correct for a vehicle to enter it. Based upon glx's code.
- Fix: [ 1203769 ] [NPF] NPF tries to plan over bridges, through tunnels, over level crossings of other players. (glx)
- Codechange: Renamed TRANSPORT_MAX to TRANSPORT_END and added INVALID_TRANSPORT.
- Codechange: Moved IsLevelCrossing() from tile.h to rail.h
- Add: GetCrossingTransportType(), which returns the transport type (road, rail) of both tracks on a level crossing.
- Removed old TODO that was fulfilled already.

(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 r2460) - Fix: Prevent assertion failure when trying to drag signals starting from a non-rail tile.
- CodeChange: Remove unused variable in CmdSignalTrackHelper.

(svn r2456) * Prettyfied npf.c using enums and wrappers from rail.h.
* Moved GetTileRailType() from npf.c to rail.[ch].

(svn r2454) * Codechange: Move #include "stdafx.h" and "openttd.h" from rail.h to rail.c
* Codechange: Move declaration of lookup arrays into the functions that need them. This doesn't pollute the global namespace with the array names.
* Add: rail.h to the openttd.vcproj and openttd.dsp for MSVC.

(svn r2450) * Codechange: Replaced all uses of the arrays in tile.h with calls to the associated wrapper functions.
* Codechange: Made npf.c use some map array accessing wrappers instead of direct access.
* Codechange/Fix: Named every enum in tile.h. Fixes a nasty bug on MSVC where arrays would be initialised with zeroes (tnx Asterix_)
* Removed magic numbers from tables in tile.c.
* Added some explicit casts in tile.h.

(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 r2442) [Translations] Updated to 2005-06-15 #2. (27+X strs / all lang)
[Translations] 10 strings got added, 8 strings got changed in english.txt, lots of work ahead

(svn r2440) - Fix: [newgrf] Fix the spritesorter to handle overlapping sprites properly, this fixes display problems with really short wagons. (algorithm by patchman, ported by therax)
- Fix: [newgrf] Too short wagons could break the 'follow next vehicle' code used in the traincontroller. Clamp better to prevent this.

(svn r2428) - Feature: [newgrf] Implement shorter train vehicles (Therax), and the callback that goes with it.
- Codechange: Remove some magic numbers (PALETTE_CRASH)

(svn r2425) - Fix (regression): wrong sprite for level-land cursor (thx Tron)
- CodeChange: change MapSizeX() - 1 to MapMaxX() in the smallmap drawing code

(svn r2423) - CodeChange: Include first_engine in the train cache, instead of calculating it all over the place.
- Fix: Also recalculate the train cache values for 'wagon chains' (in the depot without an engine), to avoid possible desyncs later.
- Fix: Make CmdMoveRailVehicle update the caches of the correct trains in all cases.

(svn r2419) - Fix: saving no longer changes your cursor if it is in a non-mouse state.
- Fix: autosaving/loading; it no longer returns a fail code when saving is already in progress. In the case of a load, the game pauses to wait for the save to finish. (glx)
- Fix (regression): fix a bug in the 'buggy load' code where a wrong offset was used for the LZO format.

(svn r2413) - Codechange: Rewrite the displaying of purchase details a bit, make it easyer to add lines later.
- Add: In the purchase details for trains display "(refittable)" after the capacity if the vehicle is refittable.

(svn r2411) - Codechange: Have trains cache stuff like consist power/weight/max speed instead of recalculating it each time.
- Fix: Station ratings now depends on the max speed of a consist, without being affected by other speed limits from realistic acceleration.

(svn r2399) - Fix: Update OS/2 project file with filename changes
- Fix: Make clipboard code a bit nicer (thanks Tron)

(svn r2393) - Implemented threaded saving for OS/2
- Fixed discrepancy with SlArray declaration

(svn r2391) - Feature: saving games happen in a seperate thread so you no longer will have to wait such a long time (especially handy on bigger maps and multiplayer games). The mouse also changes into the 'ZZZ' state :P. The thread on windows is currently given a little-bit-less-than-normal priority so it should not interfere that much with the gameplay; it will take a bit longer though. Upon the exit of the game any pending saves are waited upon.
- Fix: fixed GetSavegameFormat() so that it takes the best compressor (highest), or a forced one added with the parameter
- Open issues:
1. Don't attempt to load a game while saving is in progress, it will kick you back to the intro-screen with only the vast ocean to look at.
2. The server is disabled from threaded-saving, but might be enabled in the future.
3. Current implementation only allows 1 additional running thread.
4. Stupid global variables.....grrr
Big thanks for TrueLight and the amazing memorypool :D

(svn r2389) - Feature: [newgrf] Implement the mechanism for handling newgrf callbacks.
- Feature: [newgrf] Implement the 'refit capacity' callback.

(svn r2387) - CodeChange: made the saveload code more readable and also removed the 'byte' saveload arrays which means you can save an array of more than 255 elements, or bigger structs than 255 bytes. This doesn't yet solve the problem that a chunk can be a maximum of 16384 big.
- Fix: also fix an unnoticed error in SlSaveLoadConv() due to wrong types.