updated glm_bench to not to kill the cloud in case of exception.
minor tweak of lgm_bench.py
Added functionality to download hex files as csv files. Should be used only with small hex files (e.g. to get predictions back as csv).
bug fixes  VAStream and glm_bench.

VAStream had flipped ternary operator (returning available == -1 when there were data and vice versa), glm_bench had unmatched try.
Fixed most k-means bugs
Merge branch 'master' into cliffc-fvec2