bugfix
FIX adjust test for bugfix :-/
remove adagrad, add averaging and optional shufflen to ssvm
SSGD: make default step-size schedule be pegasos, add auto learning-rate for that.
Fix documentation of averaging and document shuffle.
fix backporting problem
TST SSGD: use default parameters in tests
ENH/FIX pegasos learning rates in subgradient latent svm
addressed @fgregg's comments
fix duality gap calculation