Added experimental "pop-in" button for popout panels.

Note that the button is currently only visible on popped-out data
panels. However it should be rather easy to finish integrating
the feature into other panel types as well.
Quick (ugly?) fix for unclear viz controls
Added H2O jar back in.
updates to the RF api for issue #42
Tab Lables
Merge branch 'master' into rfparams
Update h2o build.