new changes 07/30/2014

Graph: vid, insertEdge()
Path: getFirstNode()
PathPattern: vid
BuildingBlock
Merge remote-tracking branch 'origin/master'

Conflicts:
	PatternMining.suo
	PatternMining/SubgraphIsomorphism.cs
Merge branch 'master' of https://github.com/Parallelli/FNP

Conflicts:
	PatternMining.suo
Merge branch 'master' of https://github.com/Parallelli/FNP

Conflicts:
	PatternMining.suo