Implemented generic class with Rectange case
Circle PD updated under generic class
TwoCircle PD updated under generic class
Updated Ring PD under generic class
Updated Uni PD under generic class
Updated SmallSpirals PD under generic class
Updated LargeSpirals PD under generic class
Updated HiloDensity PD under generic class
Updated DiscreteMixture PD under generic class
Updated Unit PD under generic class
Updated MoveJump PD under generic class
Updated Move PD under generic class
Updated Jump PD under generic class
Complted implementation of PD signal and paint under generic super class
Merge branch 'dev_ashok'

Conflicts:
	demogng-master/src/ComputeGNG.java
DoubleRing PD added in the new structure; PaintComponent has bug in it