Circle coverage

[kba]

• split requirements in test and prod requirements
• setup.py reads install_requires from requirements.txt
• makefile because makefiles are the best
• coveragerc setup, run locally with make coverage
• simplified circle ci setup based on vanilla python docker image and no caching
• codecov should be integrated

[codecov[bot]]

Codecov Report

:exclamation: No coverage uploaded for pull request base (master@2866d2f). Click here to learn what that means. The diff coverage is n/a.

@@            Coverage Diff            @@
##             master      #20   +/-   ##
=========================================
  Coverage          ?   46.66%           
=========================================
  Files             ?        4           
  Lines             ?      345           
  Branches          ?       64           
=========================================
  Hits              ?      161           
  Misses            ?      170           
  Partials          ?       14

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