Indent with tabs

[The jQuery Style Guide for JavaScript](http://contribute.jquery.org/style-guide/js/) says:

> Indentation with tabs.

I have not indented with tabs `Gruntfile.js` as it would not be a part of the project created with this template. Let me know if you want it included in this PR.

I have also not indented with tabs the `.jshintrc` files as I am not sure what convention should be kept there.