ProximityController
  
UI directive controller
The cursors' position from the targets' center, and its proximity towards it, determines the controllers' value
Instantiate with target id and options-object. 

Initially developed for PrototypeJS v.1.6

Contents: 
- ProximityController - the base class
	The magic should happen in the execute-method; since this is the base class, there's no magic here yet :-)
- AutoScroller - implementation for controlling x and y scroll using proximity to the target's center.
	
Instantiation: 
 - id: target element's ID
 - options: object
	control_factor: {x, y}. Used for determining the controllers' sensitivity
	interval : in seconds
	active: x, y or both