Player sprite updated and animation dev.
Animation loading done.
Finished animation.
Put all sprites and animations into hashmaps.
Merge branch 'multiplayer' (Very broken atm)

Conflicts:
	core/src/com/saltosion/sog/util/EntityManager.java
fixed merge conflicts
Finished and polished merge, but render no longer works properly
Added empty constructors for some classes and got server working finally
Fixed unused imports.
Moved EntityPackage to it's own class.
Tagging entities and getting tagged entities added.
Removed the mysterious 'a' file and tagged player entity.
Fixed a nullpointer and removed unnecessary debugging.
Added 'Creature' tag (to be added to all living creatures)
Added CSpriteName handling to EntityPackage.openPackage()
added a system to update entity locations to player but crashes randomly