Creating non AMD build

This should address the following issue: https://github.com/Vestorly/torii/issues/39.

I burrowed ideas and code from `ember-simple-auth`'s non AMD build to create a non AMD build.

If you would like me to make further changes to the Gruntfile or anything else before merging just let me know.  For example: we may want to call the `torii.min.js` file `torii.amd.min.js` now and have a min version of the browser global version called `torii.min.js`.  I didn't want to make the executive decision without input from others.  Also, I did not add documentation either.