Merge pull request #59 from crealytics/master

Use StrongWolfeLineSearch implementation in LBFGS
moving the HMM and CRF stuff to Epic, which is where it belongs, anyhow.
Merge remote-tracking branch 'scalanlp/master'
Merge pull request #60 from crealytics/master

Port PQN from phiweave to Breeze
fix compilation errors in learn project
Merge pull request #62 from ryanlecompte/master

Update build to fix compilation errors in learn project