Handle array-based multinomials better.
Handle array-based multinomials better.

cilier/breeze,claydonkey/breeze,crealytics/breeze,sheide/breeze,wstcpyt/breeze,tjhunter/scalanlp-core,eponvert/breeze,ContentSquare/breeze,mredaelli/breeze,ktakagaki/breeze,chen0031/breeze,nikdon/breeze,ktakagaki/breeze,calippo/breeze,scalanlp/breeze,tjhunter/scalanlp-core