(svn r4342) Change the first two parameters of commands - virtual pixel coordinates of the tile to operate on - to a TileIndex
Remove DoCommandByTile(), because now it does the same as DoCommand()

(svn r4211) - Removed measuring units from the names of two strings.
- Use {POWER} and {WEIGHT_S} tags for all strings instead of "{COMMA}units".

(svn r3944) -Feature: it's now possible to turn a single unit in a train
control-click on a unit in a train in a depot will make the click unit turn around
this is useful if you want "normal" engines to act as dualheaded (one each way) or similar
this only works on single unit units. Multiheaded and articulated engines get a red error box
this is based on a quick hack peter1138 while I made it network safe and correctly handling of multible unit engines

(svn r3367) Unify the 4 distinct CMD_CHANGE_{AIRCRAFT,ROADVEH,SHIP,TRAIN}_SERVICE_INT commands into one CMD_CHANGE_SERVICE_INT command.
As side effect this is a
-Fix: The default AI tried to change the service intervals of vehicles via the CMD_CHANGE_TRAIN_SERVICE_INT command - regardless of the type of the vehicle - which of course failed for non-trains

(svn r3218) -Feature: Multiheaded train engines will now stay in the same train
This means that any user attempt to remove a rear engine will tell the user to move the front engine instead
This fixes the assert when moving multiheaded engines (introduced in r3144)
Note: to make old savegames use this feature, some engines might be turned around in order to link engines in pairs

-Codechange: train subtype is now a bitmask
This allows fast access to info like if it is a wagon or engine and if it is in front and so on
Note: savegame version bump

(svn r3181) -Bracing
-Indentation
-Whitespace
-DeMorgan's Law
-Test with NULL or 0 for non-booleans
-'\0' instead of 0 for chars
-Remove redundantly redundant comments (like DoFoo(); // Do foo)
-Join multiple short lines with a single statement
-Split single lines with multiple statements
-Avoid assignments in if

(svn r3078) Some more stuff, which piled up:
- const, whitespace, indentation, bracing, GB/SB, pointless casts
- use the trinary operator where appropriate
- data types (uint[] -> AcceptedCargo, ...)
- if cascade -> switch
- if (ptr) -> if (ptr != NULL)
- DeMorgan's Law
- Fix some comments
- 0 -> '\0', change magic numbers to symbolic constants

(svn r3077) static, const, bracing, indentation, 0 -> '\0'/NULL, typos in comments, excess empty lines, minor other changes
nothing spectacular, just some stuff, which piled up

(svn r2962) - const correctness for all Get* functions and most Draw* functions that don't change their pointer parameters
- change a lot of byte player types to PlayerID
- beautify header files, same "#endif /* filename */" ending

(svn r2764) -Feature: Clone vehicles
-This allows a player to clone an excisting vehicle of his own
-[fix]: this uncovered an excisting bug in CmdBuildRailVehicle() where depots could build trains of the wrong track type. This is fixed
-Thanks to Celestar for drawing the sprites and _luca_ for including them in openttd.grf

(svn r2657) -Codechange: The available railtypes per player are now a bitmask, so
that railtypes do not be in ascending order of appearance. Allows easier
implementation or more railtypes

(svn r2623) - CodeChange: rework DrawStringCenteredTruncated() a bit. Instead of giving center + width you give the coordinates of the bounding box (left, right) it has to fit in (ludde)
- CodeChange: changed (back) maximum pixel length of truncated strings to a signed integer.

(svn r2613) - Truncate savegames, and vehicle-texts in their window.
- Hardcoded width 5 for saves-path...oops :O

(svn r2594) Fix: [strgen] Misc updates to the string system.
- Renamed the plural command to "P" instead of "PLURAL". Now write something like this to append an s on plural: {P "" s}. (You can optionally still add an argument index to explicitly specifiy which number that's used)
- Removed the pluralized cargo strings from the string files. The new method is to use the plural specifier {P}
- Added support for genders. First add "##gender der das die" on top, then use {G=der} on a cargoname/industry to set the gender, and to switch between genders do something like {G neu neu neue} {STRING}
- Updated the swedish/english translation with P strings.

(svn r2541) -Feature: Modified IsCompatibleRail so that an engine can move on more
than one railtype (like Diesel engines on electrified rail).
-Codechange: Use IsCompatibleRail where it should be used

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

(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 r1834) - Fix: NPF does not check the owner of its target, busses try to enter other players' depots. TODO
- Add: asserts to find the v->u.rail.track == 0 problem.
- Add: IsValidDepot(), IsValidTown(), IsValidSign(), IsValidVehicle(), IsValidStation()
- Add: GetTileOwner(), IsTileOwner()
- Codechange: Replaced IsShipDepotTile(), IsTrainDepotTile(), IsRoadDepotTile() by IsTileDepotType().
- Codechange: typedeffed the MAP_OWNERS as Owner. Should be used as variable type.
- Codechange: Replaced a few uint by TileIndex.

(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 r1681) -Feature: New realistic acceleration.
This will make things more difficult as narrow curves
and depots impose rather strict speed limits. Feedback welcome
For those who don't like low-speed curves: Switch it off

(svn r1652) Fix: train and road vehicle lists are now redrawn when vehicles enters/leaves a depot (Hackykid)
fix: the ship status bar was not updated properly after a breakdown if show_speed was off (Hackykid)

(svn r1518) -Fix: server issue where some company names were wrong
-Fix: Highscore troubles; accessing members of deleted window

(svn r1478) -Fix: [1099195] mouse-wheel in train replace window. Scrollbar1 and Scrollbar2 now work independently. You can only scroll on list and scrollbar itself; scrollbar must be next widget of the list.
-Fix: updated the few gui's that didn't have the scrollbar right after the listbox.

(svn r1407) -Codechange: changed a lot around _stations, _vehicles, _towns and _industries
(in prepare of dynamic arrays):
- DEREF_XXX is changed into GetXXX
- All direct call are directed via GetXXX
- struct Industry has now an index-field
- ENUM'd some stuff
- Replaced home built loops with FOR_ALL_XXX
- Added _stations_size, _vehicles_size, ... which gives the length of the
array (which will be dynamic in the near future)
- Changed lengtof(XXX) to _XXX_size (e.g. _stations_size)
- Removed all endof(XXX) (because mostly it was part of a FOR_ALL_XXX)
- Made the sort-functions of all 4 dynamic
- Made all 4 Initialize functions more of the same
- Some minor tab-fixing and stuff
(tnx to Tron for proof-reading my 100kb patch ;))

Note for all: please do NOT directly call _stations, _vehicles, _towns and
_industries, but use the right wrapper to access them. Thank you.
Ps: please also do not use 'v++', where v is of type Vehicle *.

(svn r1401) -Fix: glitches in train-depot GUI (tnx to Hackykid)
-Fix: glitch in Company Overview GUI (Hackykid)