Merge pull request #5 from glovell/master

PSR-2
Experimental support for binding models that implement __get, closes #4
Add support for adding attributes through __call magic method
Clean up some string interpolation
Treat 'class' method call as 'addClass' through __call
Revert magic 'class' method, just replace class completely instead of adding class, less confusing
Remove unnecessary line of cooooode
Fix bug where formatted error messages were being displayed even when no error was present