starting get_OBS function
added fetch_OBS dl function
clean-up fetch_OBS function
unit conversion
added flag retrieval
added get_OBS function
Merge remote-tracking branch 'upstream/master'
added stations
added time-range selection of obs function choose_OBS
streamlined choose_OBS
retooled parse_observations to fit with downloadability
added fetch line to __main__
Merge remote-tracking branch 'upstream/master'
Merge pull request #3 from thackray/master

Observation data download tools etc.