Combine the utility classes into the helper

This fixes the issue where the select sometimes throws an uninitialized
constant - https://github.com/GetJobber/recurring_select/pull/22. I
have combined the require_relative classes into the main helper class,
which means that autoload doesn't break with rails4.
Merge branch 'master' of https://github.com/fourseven/recurring_select

Conflicts:
	app/helpers/utilities/form_options_ext.rb