tutorial: removing warning
Merge pull request #50 from lvilnis/master

Bug fixes and cleanup to BP
add first cut of faster forward-backward. still buggy with wrong logz's
BP: using the right tensor representation for marginals
BP: fixing order of edges error
BP: making BPSummary git reasonable answers for zero variables
BP: removing printlns
Merge remote-tracking branch 'luke/faster-bp-chain' into luke-fast-bp
BP: making Luke's fast chain BP work; fixing many bugs in expnormalization all over
Merge pull request #53 from alextp/luke-fast-bp

Luke fast bp
BP: fix typo
fix test failures