Adds a more advanced FPS monitor.
Merge
Merge pull request #663 from mbebenita/fps

Adds a more advanced FPS monitor.
Various fixes to e4x qualified identifier references
Fix lint failure
Merge pull request #666 from artcompiler/lint

Fix lint failure
Merge pull request #665 from artcompiler/e4x

Various fixes to e4x qualified identifier and toXMLString()