Finish setup for conda

[ScottWales]

• Set a default database path (so the conda module doesn't need to know about it)
• Add a conda build test using circle-ci
• New tags will automatically be built and uploaded to the Anaconda cloud

[codecov[bot]]

Codecov Report

Merging #20 into master will increase coverage by 0.29%. The diff coverage is 50%.

@@            Coverage Diff             @@
##           master      #20      +/-   ##
==========================================
+ Coverage   46.39%   46.68%   +0.29%     
==========================================
  Files          11       11              
  Lines         651      649       -2     
==========================================
+ Hits          302      303       +1     
+ Misses        349      346       -3

Impacted Files	Coverage Δ
ARCCSSive/CMIP5/DB.py	93.75% <50%> (+8.45%)	:arrow_up:

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