Added Matrix4 fromTranslationQuaternionRotationScale and multiplyByScale
Fixed debug bounding spheres for model matrices with scale
Added FrameState.events
Fixed createArrayBufferview length
Fix exceptions
Improve pick example
Merge master to trs
Merge master to trs
Merge master to trs
Merge master to trs
Merge quaternion to trs
Fixed tests
Add `equals` function to `Property` interface and implement it in all properties.

Still need to write specs.
Add a few specs.
Merge master to trs
Add specs for remaining Property.equals implementations.

Also fix a few issues which the specs uncovered.
Merge remote-tracking branch 'origin/master' into property-equals
Merge master to trs
Merge branch 'master' into property-equals
Merge branch 'master' into property-equals