mod base for adding billing page, create Payment controller, related spec test.
add PlansController, StripeWrapper::Customer.retrieve method
finished GET #index for billing information.
modified plans_controller rspec test, mock StripWrapper::retrieve behavior, and add stub_chain to it.
polish fonts by Google fonts in sass files, for user reviews, header
add js for show/hide payment form, modify some sass file for styling. view template filled.
fix bug in reviews_controller, @video should reload then retun VideoDecorator object which has #rating method when it failed to save @video.
fix bugs for register view template due to js show/hide func.
add rspec message expectation for plans_controller POST #create
add DELETE #destroy, for plans controller, rspec test.
Ignore uploaded tmp files to github.
rewrite README.md
Merge pull request #20 from jamesyang124/mod_ext_1

Mod ext 1