Refactor devmo app.

This splits the user profile and the events system out of the devmo kitchen
sink into own apps or the users app. Also removes tons of unused/old code.

This needs some more work:

- [x] Update chief_deploy.py and update_site.py to use the multiple step migration approach of puppet
- [x] Move users app into kuma namespace
- [x] Document steps to deploy this in prod
- Deploy
  - [x] as soon as the pull request is ready, update chief_deploy.py with a tag name
  - [x] rebase the pull request and bring the commit with the update to chief_deploy.py to the front of the commit log, force push to branch
  - [ ] merge pull request
  - [ ] deploy change of chief_deploy.py only to update it on the deploy server
  - [ ] deploy the commit that is listed in chief_deploy.py to push the rest of the pull request