Online LDA
Online LDA
1. Add minibatch functionality
2. Fix bug (phi is normalized)
Online LDA using Apache Commons Math3 matrix
Compute perplexity for each new document sets
Fix minor bugs
Delete previous one and change it to new one
Merge branch 'LDA_Online'
Make example of running Online LDA
Merge branch 'LDA_Online'
Merge Online LDA and move example file to examples package