(svn r2176) Revise CheckOprhanedSlot():
- Don't assert the vehicle type, as it can be anything
- Don't touch the slot information of the vehicle, because it's possible that it is not a road vehicle anymore and even if it is, it has nothing to to with that slot
- Trim the debug printout, because the information about the vehicle is arbitrary
(Joint effort with Darkvater)

(svn r2167) -fix: [autoreplace] trains now get the default cargo type if the engine
replaced from did not have cargo capacity (instead of refitting to passengers)

(svn r2165) - Codechange: [NPF] Properly enummed NPF hash size, it is easily changable now.
- Codechange: [NPF] Improved the NPF hash calculation slightly.
- Codechange: [NPF] Increased hash size, should speed up somewhat.

(svn r2161) - Fix: When resizing a window, the button is also visibly depressed
- CodeChange: Use images as arrows in the scenario-date scroller, looks better
- Feature: Clicked buttons with images/text now visibly depress their contents when pressed (eg it really seems like the button is moving)
- Fix: Fix sprite offsets of the arrow sprites in openttd.grf

(svn r2159) - Fix: [NPF] Road vehicles never found their target station or depots (introduced in r2154)
- Fix: [NPF] Trains still tried to go through the back of depots.

(svn r2157) - Feature (request): [ 1166978 ] Focus keyboard on input-box in Multiplayer Menu
- Feature: If the to be started server is using a password, draw a red '*' after the set password button to remind the user.

(svn r2156) -Fix: in revision 2104 someone forgot to add a very important check in
GetPrevVehicleInChain; this caused some nasty bugs in depots, like
wagons without engines complain about not being stopped, and stuff like
that. Hopefully this fixes those problems. With a big tnx to BJH for his
perfect demo!

(svn r2154) - Fix: [NPF] Vehicles should no longer try to drive through the back of depots and road stations.
- Add: GetDepotDirection() wrapper function.
- Fix: [NPF] Ships can now actually reach buoys.

(svn r2152) - Fix: Chatbar in MP games is now on-top of the news window.
- CodeChange: Introduction of SendWindowMessage() where a window can send another window a message (ala windows style msg, wparam, lparam). Messages can be sent by windowclass and by windowpointer.
- CodeChange: IsVitalWindow() simplifies a lot of checks for window handling that need to know what windows it can close, or be on top of, etc.

(svn r2145) [Translations] Updated translations (174 strs/6 langs)
[Translations] Also switched to two spaces instead of tabs (Darkvater requested)

(svn r2139) -fix: "[ 1146215 ] Engine power not updated w/auto replace" autoreplace now forces an update of the cache. It should not affect gameplay as the
cache is updated each time the train starts moving, it's just an instant update of the detail window

(svn r2136) - Fix: [ 1174313 ] terrain hotkeys nonfunctional in scenario editor (D,Q,W,E,R,T,Y,U fltr)
- Fix: 'L' no longer opens ingame terraform bar in scenario editor bar, but the land generator one
- Feature: [ 1095110 ] Create Lake and draggable Create Desert tools (initial implementation GoneWacko), also added sticky buttons to land generator and town generator
- CodeChange: moved around some of the draggable tools, demystifying them
- CodeChange: change CmdBuildCanal to allow for XANDY dragging not only X or Y (only scenario editor)
- CodeChange: add some more enums to sprites.
- TODO: merge most of the ingame and scenario editor land terraform code. This can only be done after OnClickButton function is changed so it also includes the backreference to the widget being clicked, postponed to after 0.4.0

(svn r2131) -Fix: Rewrite CmdBuildSingleRail(), this addresses several issues:
- Check input parameters for validity
- Adhere patch settings - you were able to build foundations under bridges even if foundations where deactivated
- Charge for foundations in all cases - foundations under bridges were for free
- Make the control flow more clear

(svn r2112) -Fix: ExtMidi no longer halts the game while starting a song
-Fix: Redirect stdin/stdout/stderr of the ExtMidi process to /dev/null, to prevent it from writing to the terminal
While here give the ExtMidi functions canonical names

(svn r2106) -Fix: improved the network-join algoritm, it is now a bit more stable
-Add: added 'pause_on_join' and 'max_join_time' for MP games, where you
can auto-pause the game when a client wants to join the game. This to
avoid connection losses because of big maps (200+ trains). (with tnx to
#openttdcoop for the ideas and testing)

(svn r2101) statvfs() is availible on POSIX.1 conformant systems.
Also use a different field, which has a better chance of containing meaningful information, of the returned struct to determine the free space on the filesystem and fix a small bug introduced in r2100 (s/!=/==/)

(svn r2099) -Fix: no longer chat-messages hang when the game wraps around 2090
-Codechange: while trying to find this bug, made texteff.c a bit more readable :)

(svn r2085) Improve browsing via console:
- change directory/load map via filename (number is also possible)
- add command "pwd" to Print the current Working Directory
- rename "list_files" to "ls" (and add alias "dir")
- rename "goto_dir" to "cd"
- loading of TTD maps via "load" is now possible
- switching of drives via "cd" (only applies to systems which have a drive concept) is now possible
- "scan_files" is now obsolete and was removed
This is still far from perfect, mostly because the way OTTD handles files is Broken By Design(tm), but should make file navigation via console a bit easier

(svn r2080) - Fix: [OldAI] p->ai.state_counter was uint16 but could hold a tile index, therefore overflowing - changed that to uint32 and bumped the savegame revision to 32. It *MIGHT* close bug 1151374 - it certainly caused AI to stop building anything sometimes.
- While at it, use TileIndex as the tile index type in AiRemovePlayerRailOrRoad() and AiStateRemoveTrack().
- Make the number of tiles scanned 4*MapSizeX() instead of 1000. It *MIGHT* close bug 1116614.

(svn r2079) -Add: signlist, shows all signs in the map. Clicking on them, and you go
to the sign. Very needed for coop. You can find it under World Map.