(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

src/newgrf_cargo.h

@@ -9,7 +9,7 @@
 #include "cargo_type.h"
 #include "gfx_type.h"
 
-enum {
+enum CargoClass {
 	CC_NOAVAILABLE  = 0,       ///< No cargo class has been specified
 	CC_PASSENGERS   = 1 <<  0, ///< Passengers
 	CC_MAIL         = 1 <<  1, ///< Mail