Rename jshint_conf.js to .jshintrc

By doing this sublime text and webstorm will start reporting jshint errors inside the editor.

For Sublime Text:
- Install package SublimeLinter
- Install package SublimeLinter - jshint
- From Terminal `npm install -g jshint`

For WebStorm
- Preference -> JSHint
- Make sure `Enable` and `Use config files` are selected
We could move this to the root of the project, as don't most IDE's expect it to be there? Or are they intelligent enough to grep the code base for one?