CLIMATE-241 - Update draw_taylor_diagram docstring format
CLIMATE-241 - Update draw_subregions docstring format
CLIMATE-241 - Update draw_time_series docstring format
CLIMATE-241 - Update draw_contour_map docstring format
CLIMATE-241 - Update draw_portrait_diagram docstring format
Resolve CLIMATE-241. Merge PR #83.
CLIMATE-482 - Add basic StdDevRatio metric

- Add a version of StdDevRatio without an yearly/seasonal rebinning
  prior to metric calculation.
CLIMATE-483 - Add basic PatternCorrelation metric

- Rename old PatternCorrelation metric to TemporalPatternCorrelation
  since it does an annual reshaping of the datasets before doing a
  comparison and that isn't adequately reflected in the metric's name.
  The new name also falls in line with the functionality of the
  TemporalStdDevRatio metric which also does such a rebin.
- Add basic PatternCorrelation metric that uses
  scipy.stats.pearsonr to return the r_value for the reference
  and target datasets. Note, the metric no longer returns a tuple of
  values. It now only returns the r_value. This falls much more in line
  with the metrics name in my opinion.
CLIMATE-483 - Update PatternCorrelation tests
Resolve CLIMATE-482. Merge PR #84.
Resolve CLIMATE-483. Merge PR #85.