changed ParserOptions.effect to ParserOptions.material according to Feature #1108 ParserOptions.defaultEffect should be ParserOptions.defaultMaterial
add ColladaDocument.getMatrixXMLNodeBySid() method
use ColladaDocument.getMatrixXMLNodeBySid() to check whether the channel target is actually a matrix referenced by its sid and return a MatrixTimeline targeting 'transform'
Merge remote-tracking branch 'github-aerys/dev' into dev