Removed extraneous entry in CSV header
Fixed NPE in TSController.computeItemSubset()

This was caused by lack of clarity in what could be the
result of TestPlan.getNodes(). I've improved the docs to clarify this.
Fixed regression in LTI auth filter

(I failed to check some of the launch parameters to make
sure they are not null.)
Removed extraneous entry in CSV header
Merge remote branch 'origin/production' into production
Minor tweak to rendering CSS for LTI launches

Now sets explicit background-color and color just
in case tool provider open things in a frame with
odd colours.
Merge remote branch 'origin/master'
Merge branch 'production'