v0.2.2-rc03

Considering this code is beta and a lot is changing, it is probably best to

• Uninstall the extension.
• Delete any generated files.

Fixes:

• Wrong label used for 'summed' observations (#32)
• Continual learning and cleanup in support of setting data binding.
• On-going cleanup

Enhancements:

• Add examples of charting data in additional databases.
• Configure start and end year for multi-year charts. (#30)
• Support mapping MQTT names to WeeWX names (#34)