Added pick id
Fix sensor picking
Added options to ellipsoid primitive
Merge remote-tracking branch 'origin/master' into ellipsoidoptions
Merge remote-tracking branch 'origin/master' into pickid
Appearance examples
fix vertex format
Merge master to ellipsoidoptions
Merge remote-tracking branch 'origin/master' into pickid
Updated CHANGES.md
Bug fixes from the cygnus app.
Fix `Context.setThrowOnWebGLError`

Modify `wrapGL` so that instead of simply copying properties, it creates read/write ES5 properties.

Fixes #1215
Merge pull request #1216 from AnalyticalGraphicsInc/issue1215

Fix `Context.setThrowOnWebGLError`
Fixes an index out of bounds WebGL error when the count argument to glDrawElements is zero.
Merge pull request #1217 from AnalyticalGraphicsInc/outOfBoundsError

Fix PolylineCollection WebGL warning
Merge pull request #1214 from AnalyticalGraphicsInc/bugFixes

Bug Fixes
Merge master to pickid
Add id to Polygon
Merge pickid to ellipsoidoptions
Merge pull request #1193 from AnalyticalGraphicsInc/pickid

Make Primitive and GeometryInstance picking consistent