Changes to decouple from libGDX. Stage One.
Fixes to coordinate passage through abstraction layers
Fixed: Items were untakable
Fixed: Some critical bugs
Progress towards decoupling
LibGDX is fully removed from core now
Textures are now can be copied to lib. versions
Critical fixes to texture handling
Major cleanup
Fix: Navigation now hides properly
Fix: "used items" visual bug
Fix: paper not working and item dupe
Merge pull request #5 from Itaros/master

LibGDX is now decoupled and moved to -desktop