add follow_all! method
#69
add follow all controller test
heroku
Merge pull request #73 from idanyzheng/master

#69 #70
finished follow-all
Merge pull request #74 from xiongbo/master

Finished Follow All
fixed some bugs
deploying with rails 4
change Gemfile
remove sqllite3
remove sqlite3 for deploying
Merge pull request #75 from xiongbo/master

finished deploy to heroku #72
Update README.markdown
Update README.markdown
userdata validation
Merge branch 'master' of https://github.com/bay6/prepare

:q
Modified a instance name in module SessionsHelper
sign_in?  to signed_in?
Finish Chapter 9
Merge branch 'master' of git://github.com/bay6/prepare