Changes to compare_ah.py:
 - in the user-driven scatter plots, use 30 minute data for a day
   only if the the correletaion coefficient and the number of
   accepted points exceeds given thresholds, this cleans up
   the data in the plots and makes the statistics more robust
auto dev server commit
Merge remote-tracking branch 'origin/master'
Trying to reconcile local version of compare_ah.py with version on repository.
Changes to compare_ah.py:
 - can't remember
New utility script split_toa5.py:
 - splits large TOA5 files into smaller (eg 30 minute, hourly or daily
   chunks