Set up CI with Azure Pipelines [skip travis] [skip appveyor]

Just a few environments for now to see how it will behave for a few days

azure-pipelines.yml

@@ -0,0 +1,47 @@
+# Python package
+# Create and test a Python package on multiple Python versions.
+# Add steps that analyze code, save the dist with the build record, publish to a PyPI-compatible index, and more:
+# https://docs.microsoft.com/azure/devops/pipelines/languages/python
+
+trigger:
+- master
+- features
+
+jobs:
+
+- job: 'Test'
+  pool:
+    vmImage: "vs2017-win2016"
+  strategy:
+    matrix:
+      py27:
+        python.version: '2.7'
+        tox.env: 'py27'
+      py35:
+        python.version: '3.5'
+        tox.env: 'py35'
+      py36:
+        python.version: '3.6'
+        tox.env: 'py36'
+      py37:
+        python.version: '3.7'
+        tox.env: 'py37'
+    maxParallel: 4
+
+  steps:
+  - task: UsePythonVersion@0
+    inputs:
+      versionSpec: '$(python.version)'
+      architecture: 'x64'
+
+  - script: python -m pip install --upgrade pip && pip install tox
+    displayName: 'Install tox'
+
+  - script: python -m tox -e $(tox.env) -- --junitxml=build/test-results/$(tox.env).xml
+    displayName: 'Run tests'
+
+  - task: PublishTestResults@2
+    inputs:
+      testResultsFiles: 'build/test-results/$(tox.env).xml'
+      testRunTitle: '$(tox.env)'
+    condition: succeededOrFailed()