Fourth beta release

This release adds some much requested features and fixes some bugs. There have also been some under the hood changes to make the service more reliable and easier to maintain.

Bugfixes

• The UI crashed when clicking on the 'More information button' when adding a command (#33, thanks @TomBrien for reporting!)
• Sensors and commands with spaces and other special characters didn't show up in Home Assistant (#23, thank you @robinsmidsrod for reporting!)

New features

• Current playing audio volume sensor (#13, thanks @bbrendon for the idea!)
• Media commands. You're now able to control play/pause/next/previous and volume (#21, thanks for the idea to Reddit user upboatact)
• GPU reporting. Load and temperature sensors are now available (#6)

Other changes

• Sensors that report True or False are of type binary sensor now to report their state
• Sensors reporting a point in time now use device class timestamp. This will allow you to properly use them as point in time.