Add sparse matrix feature and improve performance of graph construction
implement SpMV
Merge branch 'develop' into feature/sparsematrix
create test class for SpMV, change the package of some classes, change name of some variables and methods of XPregel
fix compilation errors
debugging sparse matrix feature
apply changes to degree-distribution implementation
Fix InDegree distribution
Change output method of test rmat
Rename TestRMAT to TestDegreeDist
Apply Graph method name changes
Merge branch 'feature/sparsematrix' into develop

Conflicts:
	src/org/scalegraph/blas/GIMV.x10
	src/org/scalegraph/fileread/InputSplit.x10
	src/org/scalegraph/graph/DistSparseMatrix.x10
	src/org/scalegraph/graph/GraphGenerator.x10
	src/org/scalegraph/graph/SparseMatrix.x10
	src/test/GIMVPageRank.x10
	src/test/GraphTest.x10
	src/test/SCCDebug.x10
	src/test/TestDegreeDist.x10