Added glowing Polylines.
Merge remote-tracking branch 'origin/master' into glowingLines
Merge remote-tracking branch 'origin/master' into glowingLines
Switched to non-linear glow, per @pjcozzi suggestion, and simplified the code.
Minor license wording tweaks
Ignore polylines with less than 2 points.

Previously the check for polyline length happened in `PolylineBucket.prototype.getPolylinePositionsLength`, but this is too late in some circumstance and causes us to index out of bounds of the position array.  This showed up with #706. We now check for length > 1 in sortPolylinesIntoBuckets, which occurs much earlier in the pipeline

I also removed a bunch of unecessary color parameters from the unit tests.
Merge pull request #712 from AnalyticalGraphicsInc/onePointLines

Ignore polylines with less than 2 points.
Merge pull request #713 from AnalyticalGraphicsInc/license

Trivial LICENSE.md updates
Fix Sandcastle ThirdParty exclusion in project preferences.
Removed pointMC
Merge pull request #717 from AnalyticalGraphicsInc/positionMC

Removed positionMC from czm_materialInput.
Merge pull request #683 from AnalyticalGraphicsInc/glowingLines

Added glowing Polylines.
Bump the version to b16 in advance of the upcoming release.
Merge remote-tracking branch 'upstream/master'
semicolon not needed warning fixed