Closure compiler - to do the dependency sorting

[voytool]

Hi!

I've been using this plugin for a while for my current project and it works fine except for that I have to pass the JS files in the order of their dependencies.

Closure compiler seem to have option to sort the files the way they have to be processed (https://code.google.com/p/closure-compiler/wiki/ManageClosureDependencies)

It would be nice to have such functionality in your plugin.
This seem to be rather straightforward request, so if you don't mind I can try to contribute to the code.

[samaxes]

Pushed into master branch.
The option name is closureSortDependencies.