Rewritten WorldMap & GEngine. Bugfixes in Camera.

WorldMap now again uses an Array to store map data.
Moved the Tiles enum to Constants. Added a count() method. Records in enum
Tiles now are strictly named after sprite names in TexturePacker's atlas
file. This is the only place where we use their names, which is making
adding more of them pretty comfortable.
GEngine now uses a Vector for storing map sprites. It loads them
dynamically with the help of Tiles enum. drawMap() is now short instead of
999 lines long. :P
Camera is now working properly. To make this possible, VRAS now passes two
additional arguments to Camera.moveTo() in touchDragged() - the
coordinates of user's finger while touching.
Also, we are now using Constants TILES_VERTICALLY and TILES_HORIZONTALLY
instead of magic numbers.

KNOWN BUGS: VRAS crashes everytime it exits, the log says something about
ActionResolver. I count on you, TrebuhD

	modified:   core/src/com/ant/very/GEngine.java
	modified:   core/src/com/ant/very/VRAS.java
	modified:   core/src/com/ant/very/WorldMap.java
	modified:   core/src/com/ant/very/objects/Camera.java
	modified:   core/src/com/ant/very/utils/Constants.java