Merge pull request #1 from PotooPirate/client_and_network

Client and network
Fight sees two units beeing close to each other, Natural Selection uses correct boundaries for random generator, Animals have collisionComponent
nix
ended debug output in FightSystem
added background music file
delete bg music because too big...
now added background music as MP3
More minor Changes in Fight, Fight between different races work
added queue for animals
fixed factory
saved two concurent modification exceptions
added new background image