initial implementation of stripe wrapper and associated tests; covers the charge method of stripe
Checkpoint in implementing API wrapper for Stripe::Charge and also related use of javascript testing and vcr
Checkpoint after fixing up more feature tests with :vcr
implemented test logic to confirm when credit card charges are made and not made
finished stripe wrapper, and feature tests for user sign in
some code cleanup prior to cide review and implemented a build_info table to store latest build date
fixed minor string formatting for build date:
removed unnecessary comment after I confirmed that Paratrooper should automatically run migration tasks
fixed variable names in users controller create action
Merge pull request #12 from yev2000/stripe_api_wrapper

Stripe api wrapper and feature tests for user registration both straightline and via invitation.  Feature tests can handle credit card charges implemented via stripe.js.  Also added tracking of builds via BuildInfo model.