Gordo

Minor version with a few fixes:
- Client should also retry on BadRequest errors (295)
- Upgrade several dependencies in the docker builds (307)
- We now push pypi packages on releases.

This is a bugfix release on 0.20.1 with the following changes:
- Uses the proper TimeoutError in the client (292)
- Improved logging in the server (289)

Breaking change:
- Rename Watchman's "metadata" top-level key to "endpoint-metadata" (249)

Other:
- Watchman: set endpoint healthy via metadata response instead of seperate request (279)
- Add resampling_endpoint up to which data will be forward filled (269)
- Client: Support retrying failed batches for POST requests
- Client: Improve logging (280)

- Add ability to have template variables in model config (250) (for hyperparameter tuning)
- Add toggle to print cross-validation scores (256) (for hyperparameter tuning)
- Add ability to download tag-data from Gina Krogh (264)
- Fix `row_filter` by using backticks for column-names (267)
- Support caching for Watchman (261)

- Add support for prefix less tag (e.g Statfjord) 183 .
- Allow watchman to look for ambassador in seperate namespace (232)
- Make client optionally ignore unhealthy endpoints (240)