Converted JO single-player projects into VS2012 format.

Upgraded projects files.
Removed precompiled headers.
Moved all JO single-player project's settings into separate .props files.
Fixed JO multiplayer to be compiled with VS2012EE.
Fixed JA multiplayer to be compiled with VS2012EE.

Also made botlib code integrated into engine project instead of separate
library.
Fixed JA single-player to be compiled with VS2012EE.
Cleaned up project files, removed some binaries.