Included the stripe gem.
Use Stripe Checkout to charge credit card
Added a yield in head block.
Use Stripe custom form to charge credit card
Included the vcr and the webmock gem.
Downgraded the verion of the webmock gem to 1.15.2 for the VCR gem.
Extracted strip behavior into StripWrapper and test it.
Included the selenium-webdriver, database_cleander and downgrade the version of capybara and capybara-email.
Fixes a bug, the raise in transcation wouldn't trigger rollback with database_cleaner configurations.
Makes all tests past.
Charges credit card and registration.
Includes the capybara-webkit gem and set as default javascript driver.
Feature test for registration with credit card.
Refactor by solution.
Avoid element not found after signing up.
Removed sleep 3 and add a extra expect to avoid the Element not found problem.
Merge pull request #12 from HenrykChiu/week_7_code_review_1

Week 7 code review 1