new: install devise
new: devise model user
new: devise view
new: devise before action setting
new: db relation
enhance:create relation
new:add koala to gemfile
new:create Facebook yml
new:create koala.rb in config folder
new: add omniauth to gemfile
new: omni setting
new: omni setting
Revert 47faf1e..12c4cbb

This rolls back to commit 47faf1e3aed9bc53a3b4f188b38968ce4fa354fe.
new: add omni-facebook to gemfile
modify:add column to users
modify:add fb development key
modify:devise model and initializer
modify:add omni in route
new: add column name and image to users
modify: modify omniauth controller