add mask operation to Graph
add filter operation to GraphOps
SVD++ demo
Update Svdpp.scala
Test SVD++
Update Svdpp.scala
Update AnalyticsSuite.scala
Update Svdpp.scala
Update Svdpp.scala
Update Svdpp.scala
Merge pull request #104 from jianpingjwang/master

SVD++ demo
Merge remote-tracking branch 'upstream/master' into add_project_to_graph

Conflicts:
	graph/src/main/scala/org/apache/spark/graph/Graph.scala
	graph/src/main/scala/org/apache/spark/graph/impl/GraphImpl.scala
Reimplement Graph.mask using innerJoin
Merge pull request #1 from ankurdave/add_project_to_graph

Merge current master and reimplement Graph.mask using innerJoin
Merge pull request #48 from amatsukawa/add_project_to_graph

Add mask operation on graph and filter graph primitive
scc algorithm
added scc tests
Merge pull request #112 from amatsukawa/scc

Strongly connected component algorithm
Split GraphSuite; simplify LocalSparkContext
Split VertexRDD tests; fix #114