met2CF.csv: working with precip to handle length units (mm, m, in) and timestep integrated observations
met2CF.csv: added Relative Humidity, Specific Humidity (qair), and Specific Humidity from RH and air temperature.  For humidity still need to add VPD and VPD -> qair
Merge branch 'master' of github.com:PecanProject/pecan
met2CF.csv: Moved additional format info into the format list (number of lines to skip, NA.strings, unit row).  Minor debugging in precip, and RH -> qair.
met2CF.csv: added wind_speed, wind_direction, uwind, and vwind.  wind_direction is never inserted, just used to calculate u and v wind from wind_speed. wind_speed is only inserted if uwind, vwind, and wind_direction are all absent
met2CF.csv:  Added longwave, shortwave, and PAR. PAR is only written to file if shortwave is absent or all NA's
Merge pull request #138 from mdietze/master

updates to met2CF.csv