Fixed warnings generated when including templates as part of a plovr build.
Merge pull request #49 from Josiah/plovr-compiler-fix

Suppress plovr compiler warnings
exports dummy goog.require function (fixes #50)
updated for latest twig version
Merge https://github.com/schmittjoh/twig.js

Conflicts:
	src/TwigJs/Compiler/ModuleCompiler.php
	twig.js