Add and setup Guard
Setup guard and spork
spec_helper: Avoid ActiveRecord::ConnectionNotEstablished exception

Replace with https://github.com/railstutorial/sample_app_rails_4/blob/master/spec/spec_helper.rb
Refer to http://stackoverflow.com/questions/17311480/rails-4-0-spork-activerecord-exception
Add a full_title helper
WIP: 5.1.1
WIP: 5.1.2
WIP: 5.1.3
WIP: 5.2
WIP: 5.3.2
WIP: 5.3.3
WIP: 5.3.5
WIP: 5.4.1
WIP: 5.4.2
Solve 5.6.1
Solve 5.6.2
Solve 5.6.3
WIP: 6.1
WIP: 6.2.1
WIP: 6.2.2
WIP: 6.2.3