Fixes const keyword for IE10
Implement XML.prototype.child()
Merge pull request #442 from artcompiler/e4x

Implement XML.prototype.child()
Add test for XML.prototype.child() as used by Candy Crush
Merge pull request #443 from artcompiler/e4x

Add test for XML.prototype.child() as used by Candy Crush
Add Matrix3D and Vector3D stubs.
Nicer parameter namess
Type-o.
Implements basic Matrix3D operations
Merge pull request #444 from yurydelendik/matrix3d

Implements basic Matrix3D operations
Merge pull request #445 from yurydelendik/ie10-const

Replacing const to var for IE10
Merge remote-tracking branch 'mozilla/master' into runtime

Conflicts:
	src/avm2/xml.js
	src/flash/geom/Matrix3D.js