Building GUI implemented

Click on a building once to trigger. Click anywhere else to close.
Currently shows HP of a building (updated every second) and allows to 
delete buildings.
BuildingGUI: ChangeListener replaced with ClickListener
Refactoring for speed up(String, Vector2 allocating in every frame removed!(hope so everywhere)). SpatialIndex for space partitioning and collisions detection(bullets with ships.
Merge branch 'master' of https://bitbucket.org/sasqoc/chip-totality
building gui improvement
Merge branch 'master' of https://bitbucket.org/sasqoc/chip-totality
New skin, new image for bullet and added rotation. (problems with tower shooting without setting rotation and difrent speed?)
Good boundingBox for ship. Gui on hit for buildings, can extend for ships easy.
Merge branch 'master' of https://bitbucket.org/sasqoc/chip-totality
bulletPool fix
ships are rotating towards target
prehealthbars improvements
healthbars for ships
Merge branch 'master' of https://github.com/arap/Chip-Totality

Conflicts:
	ChipTotality/src/com/world/ShipManager.java
	ChipTotality/src/com/world/ship/Ship.java