Revert "Text changes for demo day"

This reverts commit 21287ac6b8f59c2d92e2459726927fe010450334.
Show platform fee during checkout
Revert "Fake checkout without allowing the user to change current bank account"

This reverts commit 3082c42f1be3a1693969b086bef5b77ceeba735e.
Privative methods in PaymentGenerator class
Use fake payment generator in order to not charge user
Update dummy app
Get ruby version from dummy app's Gemfile
Merge pull request #97 from neighborly/im-new-checkout

New checkout