Fix initial ModelNode matrix for nodes targeted by animations (TRS, no matrix)
Minor test fixes
Updated CHANGES.md
Sync node matrix during animation. Fix user-defined animation start time
Remove console.log
Merge remote-tracking branch 'origin/master' into matrix-fix
Merge remote-tracking branch 'origin/master' into matrix-fix
Merge pull request #2276 from AnalyticalGraphicsInc/matrix-fix

ModelNode.matrix fix