Remove the util service

This is now in a `formHelpers` object declared using `module(...).factory(...)` this is located in the /helpers directory. I also moved the helpers.coffee into a documentHelpers object for consistency.
That's a very good point. I'm a little hesitant to calculate it on load as you can't be quite sure of the state of the document. Unless we guarantee the document is fully loaded when this is evaluated…

Otherwise we could evaluate it on first run and cache the value…