Correct weather feed parsing due to wxdata schema changes

The "day" forecast seems to be omitted from the feed after a certain
time. Since existing code relies on "day" being set, simply default
the "day" forecast to the "night" forecast so everything still works.
Correct forecast 'hi' and 't' forecast parsing

Previously, these fields were N/A, but now they are coming
back as empty XML nodes.
Merge branch 'Slashbunny/fix_weather_parsing'
Merge branch 'origin/master'