Make app deployable to GAE

We'd like to be able to build and deploy topeka, designer, and the tutorial separate from the docs repo itself. Having to build all of these apps within the same project is creating too many blockers and makes the docs repo complex for folks who just want to set it up and submit a PR.

This change adds an `app.yaml` and `deploy.sh` to this repo. It also checks in the vulcanized files so anyone running `dev_appserver.py .` won't get a blank page.

cc @ebidel @arthurevans @addyosmani @tjsavage 
But if they `bower install Polymer/designer` they'll get the release which contains hardcoded release versions in bower.json. Right?