Updated comment for profane_words_in
Created Emailable concern
Moved Emailable related tests to concerns/emailable_spec
Added Draper gem and configured for spork

Per Draper instructions for spork, added
  require 'draper/test/rspec_integration'
to spec_helper.rb
Created MicropostDecorator posted_ago

DRYs up code where printing how long ago a post was created.
Add app/presenters to load path
Added Users::FollowPresenter

* Values are memoized so that queries are only done when value is needed
  for display. This helps avoid unnecessary running of queries.
* Try out application running as
  rails s -e production
* Observe queries first time and second time.
* Notice that before abstracting out the presenter, the count query in
  the controller ran even if the view was cached.
Use subclass to avoid conditional in FollowPresenter

* Created FollowPresenter, and FollowedUsersPresenter