Clarify the unit of time for ninja_edit_window
remove reinvention of #parameterize
use omniauth-openid to replace google id
move all logic to omniauth

implement omniauth-facebook / omniauth-twitter
move 3 test to 1
merge master
using redis as backend store
Update app/controllers/categories_controller.rb

Fix extra whitespace and hash style.

Comply with a style guide like in Github.
correcting some typos in locales/en.yml
Merge pull request #133 from xdite/apply_omniauth

Apply omniauth
Merge pull request #137 from shapkin/patch-1

Update app/controllers/categories_controller.rb
Merge pull request #148 from danneu/slug-simplify

replace reinvention of #parameterize
Merge pull request #143 from pixelcort/ninja_edit_window_clarification

Clarify the unit of time for ninja_edit_window
Merge pull request #156 from kubabrecka/correct_typos

correcting some typos in locales/en.yml
Re-organization of documents

Fix links to new /docs/ directory