* Simplify version_check script
- Allow 'x.x.x' or 'x.x.x dev' on master branch (because we need to be able to tag releases from master)
- Remove duplicate regex checks
- Fix docstrings
* Run version check on all branches
- Will ensure we cannot merge in duplicate tags
* Add requests package
* Add requests package
* Updates for docker version check script:
- Do not run on a push to stable
- Check existing versions via GitHub API
- Add stable docker image tag also
* Fix regex pattern
* Check for null regex result
* Push to stable on tagged release