Add activeadmin gem.
Configure ActiveAdmin after running install.
First pass at ActiveAdmin interface to manage models.
Add lesson builder to active admin.
Remove old admin stuff.
Fix asset pipeline configuration.
Move lesson builder to active admin dashboard.
Merge branch 'master' into active-admin

* master:
  Continue polishing the design for every scenario.
  make it flush.
  if timezone isn't set, dont run at all
  more explicit about GitHub org name, and shoutout to timezone
  Revert "note about changing TZ, also uncomment TZ so it works right off the bat"
  note about changing TZ, also uncomment TZ so it works right off the bat
Merge branch 'master' into active-admin

* master:
  Only print message in test and development env.
  Switch to using dotenv-rails gem.
  Fix failing test.
  Quiet ActiveRecord logging a bit.
  Silence deprecation warning.
  Move minitest-rails to dev/test group.
  Update rails to 3.2.16.
  Attempt to precompile assets.
  Add rails_12factor gem.
  Fix bug with home page.
  Remove responsive styles for 640-1024 screen sizes.

Conflicts:
	Gemfile
	Gemfile.lock
	config/application.rb
Merge pull request #28 from CoderDojoSF/active-admin

ActiveAdmin interface