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 
That's not how you would setup designer, that's only going to work for core and paper elements. If you bower install designer you'll end up with designer in your bower_components folder, but designer expects its dependencies in [its own components directory](https://github.com/Polymer/designer/blob/master/.bowerrc#L2).

IOW, bower is not able to install an app and most folks don't use it that way. Usually you clone the project repo, cd in, and run bower install.