Entrance: Render on server

Use ejs to render the img src urls on
the server. This might actually be slower
than before, but it is an interesting
piece to continue learning more about,
with perhaps the potential for increasing
performance in the future.

Change-Id: I3a4dae6fef06174f7960f4c9d131585bc5642d94
Remove app.css

This came with the Angular seed. We don't need it.

Change-Id: I17824350684051805976f0caa1eec97e8c31181a
Performance: Move Stripe.js into body

Move Stripe.js out of the head and into the
body of the document, since we don't need
it right away.

Change-Id: Id82b44051f8bfca1d7a015f823225c46529fede6