complete active_model_serializers
Merge pull request #121 from fireweb/master

active model serializer customize the json out put
Merge pull request #120 from zlx/feature/409_active_model_serializers

complete active_model_serializers
Create 409_165r.markdown
Merge pull request #126 from fireweb/master

finished 409 active model serializer
Merge pull request #127 from fireweb/master

starting 165 edit multiple revised
Merge pull request #128 from fireweb/master

finished edit multiple 165 revised
Merge pull request #130 from fireweb/master

started working 405 angularjs
init 409
add json into articles
rails g serializer article
rails g serializer article
add url
add comment serializers
add embed comment_ids
add current_user
finish 409
init, add associations
add track_activity
add activities page