Add files needed at runtime (textures, sound, configuration)
Tweaked stuff in order to compile under linux
Purged many unnecessary string and vector copies
Tweaked function game_engine::creature_actions prototype, fixed typo in FIXME
Fixed crash when creatures have null movement speed; refactored a few other functions
Cleared a few more warnings (mostly sign-unsigned comparisons and unused variables)
Tweaked a few parts of the code
Merged that
Fixed the merge (derp)