Set up CI with Azure Pipelines

[tmontes]

Exploring Azure Pipelines. Objectives:

• Try to address Add automated testing on Windows? #94.
• Then try addressing Add automated testing on macOS? #95.

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (master@aed487e). Click here to learn what that means.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             master   #113   +/-   ##
=======================================
  Coverage          ?   100%           
=======================================
  Files             ?     22           
  Lines             ?    871           
  Branches          ?     56           
=======================================
  Hits              ?    871           
  Misses            ?      0           
  Partials          ?      0

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[tmontes]

Progress:

• Azure Pipeline now running Windows tests with 64 bit 2.7, 3.6, and 3.7 Python.

Next:

• Let's create a template to run the tests on macOS as well.