Toggle v1.4.0

• Much work cleaning up existing styles and added a new one.
• Added pytest for some of the core functionality.

Toggle 1.3.0

Toggle 1.3.0 brings the following new features:

• Octoprint 1.3.10 compatibility (authentication with the OctoPrint websocket)
• Manga Screen 2 Large theme
• Manga Screen 2 Small theme
• Revolve-compatible number of heaters