Update README.md

Ready for publishing v0.4.0

Fix list sorting test to be case insensitive for Travis

Bump version to 0.3.0-beta

Fix Plex not updating on completion and formatting issues

Update install string in readme

Update requirements.txt

Patch security vulnerability of old pyyaml

Bump version to 0.2.5, drop support for Python 3.5

Bump version to 0.2.4, deprecate support for Python 2.7

Release version 0.2.3-alpha