(svn r7494) -Fix: Really disable AI's in Multiplayer if you tell it so. In loaded games with
AI's the setting didn't take effect, resulting in immediate desyncs.

(svn r6776) -Codechange: Use IsValidPlayer() function to determine of a PlayerID is an
actual playable player (< MAX_PLAYERS) or not.

(svn r6774) -Codechange: Rename the badly named OWNER_SPECTATOR to PLAYER_SPECTATOR and
put it into player.h where it belongs (instead of map.h)

(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 r3313) Remove GPMI related changes from trunk
Revisions in detail: 2542, 3226 (partial), 3229, 3231, 3232, 3238, 3242-3245, 3251, 3253, 3260, 3263, 3265, 3266, 3269, 3277, 3278, 3279, 3283 (partial), 3304, 3305, 3306

(svn r3304) -Add: allow AI-events to see the UID of the command
-Fix: improved the logic of the UID code for AIs

(svn r3285) -Codechange: Tron was confused by a name, so let's make him happy,
prefixed it with 'tmp', so now we know it is a temp char* :)

(svn r3283) -Fix: decode_parameters was still used, while _cmd_text is the way
-Fix: _cmd_text is cleared after a command, so we need to store it
temporaray in order to first test the command, before executing

(svn r3279) -Fix: do not try to execute something that is not set to execute
-Fix: do not increase an uid number if it isn't returned

(svn r3246) -Fix: small glitch in ai_network_client code (network_client.c)
-Fix: make sure this glitch can never happen again (ai.c)

(svn r3238) -Fix: always save if you want GPMI-based AIs, this on request by
Darkvater, so we can, in the future, save patch options in savegames
without any problems.

(svn r3232) -Add: implemented the event-system for AIs
-Add: added several hooks (event-callbacks) for road-related-stuff

(svn r3226) -Fix: GPMI implementation had minor glitches
-Fix: the AI speed control is done by the AI-core, individual AIs don't have to do it (so, AIs were delayed twice ;)
-Add: Support for AI-network-clients (an AI, connecting to a remote server)
-Fix: minor AI-core problems

(svn r3224) -Add: Allow the NewAI to work in Multiplayer Games (switchable via patch
settings, off by defaut). An other step to AIScripts.
WARNING: this is still highly experimental and has known bugs!

(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 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 r2948) -Fix: the old AI needs a special flag that triggers all kind of special
abilities you really don't want to know about (free bridges, etc..)
I removed this flag some revisions ago, but the Aircraft part
depends on it, so I re-enabled it again..

(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!)