(svn r15027) -Merge: tomatos and bananas left to be, here is NoAI for all to see.
NoAI is an API (a framework) to build your own AIs in. See:
http://wiki.openttd.org/wiki/index.php/AI:Main_Page
With many thanks to:
- glx and Rubidium for their syncing, feedback and hard work
- Yexo for his feedback, patches, and AIs which tested the system very deep
- Morloth for his feedback and patches
- TJIP for hosting a challenge which kept NoAI on track
- All AI authors for testing our AI API, and all other people who helped in one way or another
-Remove: all old AIs and their cheats/hacks

(svn r14958) -Codechange [FS#1923]: when checking for unique names, compare only with manually set names
There are situations that aren't solvable (because of different language files), so if the user really wants to have duplicated name, allow him to do so. It solves desyncs between server and clients using different languages. It behaves the same in SP and MP, so users won't see the different behaviour as a bug (and even checking in SP could be worked around by the user).

(svn r14735) -Codechange: remove a bit of bit-waste in the map array (without changing the map array) and make the CompanyIDs contiguous.
-Note: 15 should be enough for now... making it any more means adding more bytes to the map array and thus wasting more bits instead of reducing the bit waste.

(svn r14611) -Fix (r13437)[FS#2421]: Store the age of a house in the map array instead of the construction year.
Note: Savegames from r13437 to now are broken and have a age of 255 years for a lot houses.

(svn r14591) -Fix [FS#2388](r14528): cached nearest town could be invalid after importing older savegame and during town generation
-Codechange: rewrite parts of code responsible for caching index of nearest town

(svn r13618) -Codechange: move tar-specific declarations to separate file
Removes indirect dependency on <string> and <map> for over 40 files

(svn r13251) -Codechange: rename _patches to _settings as that is more logic.
-Codechange: move all Settings into substructs of _settings in a way that they are logically grouped.

(svn r13233) -Fix: Replace some (incorrect) evaluations of TileOwner by RoadOwner.
-Fix: Before evaluating RoadOwner, check if the roadtype is present.
-Fix: Some places assumed that MP_ROAD means normal street.

(svn r13226) -Feature: Allow to have more than only two airports per town. The number of airports is now controlled by the noise each of them generates, the distance from town's center and how tolerant the town is.
Initial concept : TTDPatch (moreairpots), Initial code : Pasky
Thanks to BigBB (help coding), Smatz Skidd13 and frosch for bugcatches and advices

(svn r12062) -Fix: possible deadlock when there are no houses available to build at given tile
-Fix: houses with zero probability could be built

(svn r12060) -Fix: do not clear tiles when the town won't be able to build any buildings anyway
-Fix: allow building 2x2 building on slopes if not explicitly forbidden
-Fix: it was possible to build 2x1 and 1x2 buildings on slopes even if it was not allowed

(svn r12021) -Cleanup: Make some parts of the town growth a bit more descriptive
-Codechange: Remove some needless checks

(svn r11822) -Codechange: Replaced fixed size custom name array. Names are now attached to their object directly and there is
no limit to the amount of names.
-Fix: NewGRF engines could not be renamed.