some cleaning up/compartmentalization for plotting/graphics, and some formatting for temperature display.
Merge branch 'master' of https://github.com/wtodom/simpleWeather

# By Vincent Ahrend
# Via Vincent Ahrend (1) and Weston Odom (1)
* 'master' of https://github.com/wtodom/simpleWeather:
  Make path to "private.json" relative to script location