SSGD: make default step-size schedule be pegasos, add auto learning-rate for that. Fix documentation of averaging and document shuffle.
SSGD: make default step-size schedule be pegasos, add auto learning-rate for that.
Fix documentation of averaging and document shuffle.

massmutual/pystruct,d-mittal/pystruct,wattlebird/pystruct,pystruct/pystruct,d-mittal/pystruct,wattlebird/pystruct,massmutual/pystruct,amueller/pystruct,pystruct/pystruct,amueller/pystruct