Add cross-platform CI wheel builds

.travis.yml

@@ -1,12 +1,37 @@
 language: python
-python:
-  - "2.6"
-  - "2.7"
-  - "3.2"
-  - "3.3"
 
-# command to install dependencies
-install: "python setup.py develop"
+matrix:
+  include:
+    - os: linux
+      dist: xenial
+      sudo: required
+      python: 3.7.2
+      services:
+      - docker
+      env: CIBW_BEFORE_BUILD="rm -rf build/" CIBW_TEST_COMMAND="python3 {project}/setup.py test"
+    - os: osx
+      language: generic
 
-# command to run tests
-script: "python setup.py test"
+install:
+  - pip3 install setuptools
+  - pip3 install -e .
+
+script:
+  - python3 setup.py test
+
+env:
+  global:
+    - TWINE_USERNAME="<YOUR_PYPI_USERNAME>"
+    # - secure: <YOUR_ENCRYPTED_PYPI_PASSWORD>
+
+before_deploy:
+  - pip3 install -r deploy-requirements.txt
+  - cibuildwheel --output-dir dist
+  - python3 setup.py sdist --dist-dir dist
+
+deploy:
+  provider: script
+  script: "twine upload --skip-existing dist/*"
+  skip_cleanup: true
+  on:
+    tags: true

appveyor.yml

@@ -0,0 +1,26 @@
+environment:
+  TWINE_USERNAME: "<YOUR_PYPI_USERNAME>"
+#  TWINE_PASSWORD:
+#    secure: "<YOUR_ENCRYPTED_PYPI_PASSWORD>"
+
+install:
+  - pip install -e .
+
+before_build:
+  - pip install -r deploy-requirements.txt
+
+build_script:
+  - cibuildwheel --output-dir dist
+
+test_script:
+  - python setup.py test
+
+artifacts:
+  - path: "dist\\*.whl"
+    name: Wheels
+
+deploy_script:
+  - ps: |
+      If ($env:APPVEYOR_REPO_TAG -eq "true") {
+          & twine upload --skip-existing dist/*.whl
+      }

deploy-requirements.txt

@@ -0,0 +1,2 @@
+cibuildwheel==0.12.0
+twine==2.0.0