add bootstrap-sass gem for bootstrap
add rspec-rails for rspec test
add home index action
add partial html file
add logo png
add city model
add city annotate
add city seed
Merge branch 'feature/city' into develop
add tour scaffold
add annotate and rspec
add city and tour relation
Merge branch 'feature/tour_model' into develop
add ticket model
1. add tour and relation param permit
2. add Tour#price method
Merge branch 'feature/ticket_model' into develop
add friendly_id gem
City use friendly_id gem for 'city name' url
modify rspec file
Merge branch 'feature/city_friendly_id' into develop