Compliance helpers

@fancyremarker  This, depends on #14 first

The main idea here is to generalize some of the helpers inside dashboard so they may be used in the compliance apps.

What do you think about the change to `register_url` inside view_helper.rb?  This allows all apps to share common header partials without defined routes for orgs/users.


I'd definitely make this a method, it's a bit different than the static URLs for which `register_url` was intended. It can probably go in `Aptible::Rails::Controller`, but you can also put it in `Aptible::Rails::ViewHelpers` if you think that's better.