talks: update repo to be deployable on App Engine again

This change moves the talk content in the content/ subdirectory
now that the default for App Engine is to use that directory per

Also update the README, app.yaml, and add a .gcloudignore since
running gcloud app deploy will add it to the file tree if it
doesn't exist.

Fixes golang/go#28080

Change-Id: Ie5dff7844d272d21ccb6db28aa1ca231f703787a
Reviewed-by: Andrew Gerrand <>
982 files changed