Merge with 12a22c833fc6521161c4828dba42f68033aaa9d1
TODO problem marked in ODDemo
Rectangular Bounds -> Polygonal Boundary
Conflict generator can be given a rectangular region in which the conflict should be located.
few minor fixes
1) Vizualization now shows the algorithm name2) OD now has a option to stop3) All the edges returned by od has a fixed time duration
Fixed problem with subobtimality.
Algorithm did not stop exploring the search space subspace of agent after finding its state to be a goal state.