V1.0.1-rc01

Fixes:

• 'Current' and 'Min/Max' sections are now optional.
• 'Landing page' is now optional.
• Handle the case where the WeeWX default value for 'unit_system' is missing.
• Raise an exception during generation if the WeeWX default value for 'lang' is missing.
• Correct UTC offset used for min/max date time display.

Enhancements:

• Additional debug logging.