mod13 base.
mod13 hw1 fininshed, rspec test for Strip::Charge.create
mod13 hw2-1 finished, add selenium-webdriver(require firefox), database cleaner and add mock data for each test.
mod13 hw2(2), instead use stub, should(_not)_receive to ensure the method must be called.
mod13 hw2(2) finished. move Stripe.api_key = ENV from sinppets to initializers/stripe.rb
mod13 finished, added feature test for JS validation.
mod13 finished.
Merge pull request #17 from jamesyang124/mod13

Mod13
feature test for JS validation. JS validation is before the sending request to server.