Revised the join of VAA data to flowlines in SFR_preproc.py to omit non-matching records. This also speeds up the join quite a bit
Added a log file to SFR_prepro.py
Cleaned up a bit of printed output and logging in SFR_preproc.py
Merge pull request #3 from mnfienen/master

Revised the join of VAA data to flowlines in SFR_preproc.py to omit non-...