Updated get_stations to filter out duplicates.
First round of contouring plots. contour_forecast.py processes model data, contour_observations.py processes metar data. Scripts aren't very configurable yet.
Reorganized some directories. Added GIS files for US states used in plotting. Updated globals accordingly.
Fixed major bug in get_metars.py. Columns and values had a mismatch with caused vis, press, and slp to get mixed up in the database. Updated crontab to increase metar retreival frequency.