init project
[NewFeature] install bootstrap
[NewFeature] use twitter-bootstrap-rails gem. add application.html.slim layout
[NewFeature] generate merchants scaffold
[Change] custom view with bootstrap
[NewFeature] add search function to merchants with ransack
[NewFeature] reduce controller code with nifty-generators
[NewFeature] use nifty-generators manage config file
[NewFeature] generates generic helper files
[Change] merchants index and show page
[Change] merchant migration and view
[NewFeature] add merchant_rate model
[Change] merchant and merchant_rate relation
[NewFeature] merchant use accepts_nested_attributes_for to create related object: merchant_rate
[Refactor] improve merchant search form
[NewFeature] merchant management