Allow unit to be overridden for a specific plot by using new option 'unit'.
Fixes issue 729.
Fix problem that prevented wind from appearing in NOAA yearly summaries.
Fix honoring global values for log_success and log_failure. Fix issue 757.
wee_import CSV imports now allow import of text fields. Addresses issue 732.
Explain in the Customizing Guide how to include arbitrary SQL expressions
in a plot.
Reorder font download order, for slightly faster downloads.
Fix issue 760.
Add observation types highOutTemp and lowOutTemp to group_temperature.
Add unit groups for sunshine and rain duration, cloudcover, and pop.
PR 765
Do not allow HUP signals (reload is not allowed as of V4.6).
PR 766.
Do not fork if using systemd.
PR 767.
Fix problem that prevented wee_config --reconfigure from working when
using Python 2.7, if the configuration file contained UTF-8 characters.