Codalab

Features
- Use `cl-competitiond` instead of `scripts/competitiond.py` (1415)

Fixes
- Solve permission denied issue in writing alembic version files to container (1405)
- Handle cookies from 0.3.x -> 0.4.x gracefully (1433)
- Fix error when displaying image in worksheets (1432)
- Specify dependencies so that docker services are stopped/deleted in the right order (1416)
- Re-add travis-deploy.sh so that new versions are published to pypi (1435)

Bug fixes
- Fix several unicode issues with the Python 3 migration (1371, 1376, 1389, 1391, 1393)
- Make netcat and netcurl work properly again, and fix unicode issues (1407)
- Fix account activation and password reset emails over https (1399, 1411, 1418)
- Flush username prompt when authenticating (1409)
- Fix duplicate mount points in default config (1370)
- Fix mapping port to a value not equal to 80 in nginx service (1394)

Features
- Add .limit=10 to wsearch (1353)
- Set autofocus on username when user enters into login page (1340)

Other changes
- Remove SQLite support (1351)
- Remove event table (1375)
- Remove codalabworker package (1402)
- Allow branches with "/" in their name to build on Travis CI (1381)

Changes
- Migrate from Python 2 to Python 3.6. You must now use Python 3.6+ to use Codalab (1014 and 1356).
- Remove some dead code (1354).

Changes

- Added parallel run quota (maximum number of runs a user can run)
- Workers report amount of free disk for monitoring
- Clean up and update documentation (move to readthedocs)
- Fail unresponsive bundles (cleanup)
- Documentation moved to readthedocs
- Updated `./codalab_service.py` to be more flexible and general improvements to deployment

Changes
* 1097: One-click deployment. Now you can use our deployment script to bring up an entire CodaLab Worksheets instance and initialize it properly using the magic of Docker compose, without worrying about setting up MySQL or nginx. Refer to our [update Wiki page](https://github.com/codalab/codalab-worksheets/wiki/server-setup) for detailed instructions.
* Out-of-memory errors now print descriptive error messages instead of Exit code 137
* Container pruning for killed containers improved and hence docker image download issues reduced.

Worker hotfix:
* Prune finished Docker containers from runs more aggressively on worker so it can clear its Docker image cache faster and avoid Docker image download failures

CLI hotfix:
* Don't accept non-ASCII unicode characters in Run bundle commands