Fixed AS script path in initialization.

Also fixed the console.as script by dropping an obsolete console command. (aithreads)
Oops, forgot to make the creatures.def file follow the installation path.
Dropped load/save maps from TGA files.

This is obsolete, half-finished and non-working code that shouldn't have been pushed
in the common repository in the first place. Sorry Tom.

I also removed some obsolete console commands.
Merged the getMapName and getMapDescription in a more efficient function.
Improved the display of player slot and AI in the map descriptions UI.