Rename WeatherData1950_2012 to WeatherData

Station ID, ObsDate, Type, SOW, Temp(F), RH, 24hr Precip, Duration, WindSpeed, Direction, Azimuth MaxTemp, MinTemp, MaxRH, Min RH, WetFlag, SolarRad, GustDir, GustSpeed, HourlyPrecip, OMC10, Season, GreenHerb, GreenShrub