Avoid crash in ResultUtils
speed improvements
StageUtils: fixed bug where it would waste time doing nothing on an
async task that returned early.
SessionManager now triggers callbacks one frame after an object becomes
unbusy if it has not triggered callbacks yet.
SessionManager/ProgressIndicator busy tasks are now coordinated.
Updating code to account for recent changes in StageUtils and
ProgressIndicator.
Fixed RadViz crashing bugs & performance bugs.
weaveTrace now separates multiple args by spaces
fixed bug where dbf column names weren't being listed when selecting
file off server

Change-Id: I9e8d3f5102441b5f14a9da651c477fb8b2ca1006
getVar() renamed to getValue() and now supports expressions
Merge remote-tracking branch 'origin/master' into datatableprobe