BF: fix order of index subject, condition to slice data in format_matrix
Merge pull request #14 from cindeem/fix_newman

BF: fix order of index subject, condition to slice data in format_matrix
BF: fix newman spectral partition to use original modularity matrix in subsequent splits instead ofrecalculating modularity matrix on subgraph
Merge pull request #15 from cindeem/spectral_fix

BugFix spectral Partition