Add nopass test and dataset for pub 837
Merge branch 'tomas_glm' of github.com:0xdata/h2o into tomas_glm
Merge branch 'master' into tomas_glm
Fixed size in KeySnapshot - for frames take the Frame.byteSize() instead of the (useless) size if the frame header itself.
Added back fix for empty files during multi file parse task (looks like it got lost during merges)..
Made GLMRandomTest random (and log the seed).
Reverted previous change in KeySnapshot: can't get real byte size for frames at the moment (invokes RollUpStats).
Fix in glm2:
  a) unlock dataset and remove progress in overrided cancel(msg) instead of cancel() which was not being called
  b) fix line-search: added checking for max_iterations in case of NaNs/Infs cause line search.
Fixed GLMRandomTest
Updated KeySnapshot/KeyInfo to include numerous and numcols for frames (since we can't have byte size).
Updated parse ui to filter out empty files (so that user can see them not being included in the parse).
Fixed ParseException test to get parser setup from multiple files before it breaks them (so that we don;t get exception from guess setup before parse even starts)
Merge branch 'master' into tomas_glm