makes background and core resize as the frame resizes.
bug: the grass gets instantly redrawn but the trees need a keyevent.
separated imports.
Initial commit
Threading works, drawing lag is limited to none. getting flickering in
drawing and nullpointexceptions.
Cleaned code
converted to swingworker

Bug: index out of bounds at core.paintComponent 71
converted to swingworker

Bug: index out of bounds at core.paintComponent 71
Merge remote-tracking branch 'origin/threading' into threading
added mouse dragging and a nullpointerexception catcher in
Core.paintComponent
hashmap
fixed an error on additions to chunk, produces concurrency errors.
Fixed Concurrency, threading now seems to be working, albeit the code
should be cleaned up and streamlined.
Merge branch 'threading' into development

Conflicts:
	Background.java
	Core.java
	Main.java
Grass now is stored in chunks, grass moves with the world, chunk size is
now configurable, changed a few things regarding to world generation.
Added zones compromised of 16x16 chunks
Merge pull request #3 from rodilf/development

Development