PY3 new overfit prevention stuff in 20newsgroups loader

Why were the tests not catching this?
ENH: directly call BLAS to further improve ICA memory
FIXES: dot products
ENH: fix BLAS, get tests running, reduce MEM
COSMITS + FIX version issue
ENH: equalize call signatures, address API
ENH: improve impose f order
ENH: return np.dot if blas not available
ENH catch attribute error
ENH: remove debugging support statements + checks
ENH: more fast dots
FIX/STY: addressing @agramfort 's comments
ENH: better 2d handling
COSMIT
what's new
COSMITS