mod 11 and mod 12

This pull request combines the assignments for mod11 and mod 12:

1. Admin Signs in
2 Admin Adds a Video
3. Watch Video
4. Feature Tests for Adding Video
5. Use Stripe Checkout to Charge Credit Card
6. User Stripe Custom Form to Charge Credit Card
mod11

Minor updates
Merge pull request #12 from jlevinger/mod11

mod 11 and mod 12