Finally unfroze Closure library dependency.
Release v5.2.30
Update Node.js engine to 0.10.0
Release v5.2.31
Update travis node.js version to 0.10
Release v5.2.32
Remove goog.memoize.

To prevent TypeError: Cannot read property 'ENABLE_MEMOIZE' of
undefined error.
Release v5.2.33
Temp fix for IE8.
Release v5.2.34