Use devise from master.
Remove any guard stuff.
Remove assets group
Install gems to .bundle
Update config files
Update brakeman to 2.1.0
Use 1.9 hash syntax
Update jquery-rails to 3.0.4
Introduce bin/server
Use sendgrid only if ENV['SENDGRID_USERNAME'] exists
Update README
Update rspec to 2.14.1 and rspec-rails to 2.14.3
Do not use bundle exec in bin/ci
Replace double quotes with single