(svn r27729) -Codechange: Do not count static NewGRF when checking for the maximum number of NewGRFs in a game.
-Codechange: Remove LAST_GRF_SLOT and MAX_NEWGRFS. Now NETWORK_MAX_GRF_COUNT is the only constant to specify the maximum number of non-static NewGRF.
-Codechange: Increase the number of file slots, effectively increasing the maximum number of static NewGRF and baseset GRFs.

(svn r25841) -Codechange: Use NUM_AIRPORTTILES_PER_GRF instead of NUM_AIRPORTTILES to properly distinguish limits per NewGRF and limits of the pool.
-Change: [NewGRF] Lower the limit of airport tile types per NewGRF from 256 to 255 to prevent usage of ID 0xFF in Action3, and thus allowing it to become an extended byte somewhen.

(svn r25839) -Codechange: Use NUM_HOUSES_PER_GRF instead of NUM_HOUSES to properly distinguish limits per NewGRF and limits of the pool.
-Change: [NewGRF] Lower the limit of house types per NewGRF from 256 to 255 to prevent usage of ID 0xFF in Action3, and thus allowing it to become an extended byte somewhen.

(svn r25837) -Codechange: Use NUM_INDUSTRYTILES_PER_GRF instead of NUM_INDUSTRYTILES to properly distinguish limits per NewGRF and limits of the pool.
-Change: [NewGRF] Lower the limit of industry tile types per NewGRF from 256 to 255 to prevent usage of ID 0xFF in Action3, and thus allowing it to become an extended byte somewhen.

(svn r25834) -Codechange: Use NUM_OBJECTS_PER_GRF instead of NUM_OBJECTS to properly distinguish limits per NewGRF and limits of the pool.
-Change: [NewGRF] Lower the limit of object types per NewGRF from 256 to 255 to prevent usage of ID 0xFF in Action3, and thus allowing it to become an extended byte somewhen.