#Issue 6: MF example stub; #Issue 69: factor and node labels spec stub
Issue #69: nodes and factors can get a label that is displayed when printing
Merge remote-tracking branch 'origin/dev' into dev

Conflicts:
	wolfe-core/src/main/scala/ml/wolfe/FactorGraph.scala
	wolfe-core/src/main/scala/ml/wolfe/MaxProduct.scala
	wolfe-core/src/main/scala/ml/wolfe/macros/MetaAtomicStructures.scala
Merge remote-tracking branch 'origin/dev' into dev
added wolfe nlp subproject
fixed notation in factor graph spec
Added way to pass VM arguments to sbt
fixed bug in vmargs sbt command
Merge branches 'CompetitiveNER' and 'dev' of https://github.com/wolfe-pack/wolfe into CompetitiveNER