add stripe & figaro gems

start stripe integration
add test keys in application.yml
create charges controller & views
update price value in charges controller

change highlight create & update redirect
add highlight info to new charge page
add state_machine / format integers for currency

create 1st 2 states - transition if paid
complete test for highlight creation
add delete/cancel option on new charge page
Merge pull request #2 from jonrish/stripe

Stripe