(svn r11176) -Revert (r9867): as it is needed for newgrf callbacks 14B and 14C

(svn r11175) -Codechange: sort the NewGRFs by name, making searching a specific NewGRF a lot easier.

(svn r11174) -Codechange: add possibility to show the bounding boxes of sprites using CTRL-B so one can get a better understanding of the used bounding boxes to fix the glitches that still exist. Patch by frosch.
Note that this is not completely glitch free, bounding boxes sometimes aren't removed properly. This is due to the fact that the bounding boxes sometimes are larger than the sprite, which causes a smaller part than the bounding box to be redrawn. This is NOT a bug, but a known implementation limit as we do not want to slow down normal games so the debug graphics are always 100% correct.

(svn r11173) -Codechange: rename some callback enums so they are more uniform.

(svn r11172) -Codechange: rewrite of town road building and addition of the possibility to clean up unconnected road bits during the local road reconstructions. Based on a patch by skidd13.

(svn r11171) -Fix [FS#1257]: disable autoslope for automatically changed stuff (like towns and industries) and enable it in the scenario editor. Patch by frosch.

(svn r11170) -Fix (r11152): a variable's type was too small for the data that is going to put into it when NewIndustries are finally activated. For now it just removes a warning and doesn't really fix anything.

(svn r11169) -Fix [FS#1255]: obiwan in Blitter::Drawline(), which caused it to clip too much at screen/viewport borders. Patch by frosch.

(svn r11168) -Fix [FS#1256]: assert on terraforming of industries. Patch by frosch.

(svn r11167) -Fix [FS#1260]: Electric trains were not shown as stopped in depots when converting it from elrail -> normal rail. Patch by smatz.