changed twitter created_at to in_time_zone
removed userdoc document validation, added no attachement default image
changed 141 check to proficienct check, added helper with proficiency info to instructors index
added proficiency info to index of instructors
fixed css max-width for user docs
fixed a few old ground routes (made them use nested grounds route)
refactored user helper to class method, add some methods for name with ownership
removed some error checks when user is only an admin
working on client side validations
added aircraft_type to courses.  change approved aircraft choices for a course based on the aircraft type
added fields to requirements, implemented those fields.  Added distance_of_time_in_words_to_now to tweets
added new requirements fields to index
refactored routes for rating and course has_one requirement
refactored requirements, fixed schools method for finding FIs with missing cert info
much refactoring.
fix ability
fixed missing cert query
renamed endorsement_categories model and attr
fixed downcase on username at login...some usernames may camel
fixed ability for FI to create proficiecny check