CLIMATE-439 Added calc_climatology_year function
CLIMATE-445 - Remove code checkout from easy-ocw Ubuntu install
Resolve CLIMATE-445. Merge PR #41.
CLIMATE-446 - Use archive link for Anaconda download
Resolve CLIMATE-446. Merge PR #42.
CLIMATE-443 - Add metrics.SpatialStdDevRatio metric and tests

- Metric includes the calcClimYear function from RCMET. Waiting
for CLIMATE-439 to complete.
CLIMATE-439 unittest for calc_climatology_year in utils.py
Merge branch 'CLIMATE-438', Merge PR #44, Resolve 'CLIMATE-439'.
Resolve CLIMATE-443. Merge PR #43