core: Improve the error for no stock
frontend: Improve the error for no stock
CHANGELOG: Update
core: Imprement validation for stocks
frontend: Fix the default quantity into the cart
Fix a spec for order with no stock
Change error messages and paths
rubocop: Refactor methods
frontend: Change the key of the assignment for flash error
Merge branch 'master' into hotfix/no_stock_error

Conflicts:
	frontend/app/controllers/comable/carts_controller.rb
Merge pull request #37 from hyoshida/hotfix/no_stock_error

Improve no stock error
CHANGELOG: Update
Bump to 0.2.1
core: Add devise gem
frontend: Add routes for devise
core: Implement configuration
frontend: Fix order flow for logged-in customer
core: Install jquery-rails for suppport signout with DELETE method
frontend: Add login and logout menu for members
core: Install enumerize gem