Hackfixing like a baws.
Allow global JSON values as an extension to Gruntfile config
Properly refactored instead of hackfixing.
* Works with latest grunt
* Accepts src patterns rather than single file names from root
* Looks for global.js inside the root dir for main overrides (As not to bloat your Gruntfile)
Merge pull request #4 from nickpack/master

Hackfixed it to work with the latest grunt