Remove unneeded flags from top level CMakeLists
Add build files to .gitignore
Added return on mob spawn
Merge pull request #22 from mdcasey/master

CMake cleanup/fixes
Added return on mob spawn
Merge pull request #23 from SKOBoL/master

Added return on mob spawn
* Reworked SynchVersionAns, loading screen is functionnal again, no more bugsplat.
One step closer to multiplayer, turrets are now instanciated only once and reused in the spawn packets.