Add support for automated wheel packaging / PyPI deploys

See https://www.benfrederickson.com/writing-python-extensions-in-rust-using-pyo3/

.travis.yml

@@ -0,0 +1,42 @@
+language: python
+
+matrix:
+  include:
+    - name: "Linux 64-bit"
+      sudo: required
+      services:
+        - docker
+      env:
+        - CIBW_SKIP=*manylinux1_i686*
+        - PIP=pip
+        - PYTHON=python
+    - name: "Linux 32-bit"
+      sudo: required
+      services:
+        - docker
+      env:
+        - CIBW_SKIP=*manylinux1_x86_64*
+        - PIP=pip
+        - PYTHON=python
+    - name: "macOS"
+      os: osx
+      language: generic
+      env:
+        - PIP=pip2
+        - PYTHON=python2
+
+env:
+  global:
+    - TWINE_USERNAME=michael.sanders
+
+script:
+  - $PIP install cibuildwheel setuptools_rust
+  - export CIBW_BEFORE_BUILD="pip install setuptools_rust && source ./scripts/travis"
+  - export CIBW_SKIP=cp34-*\ $CIBW_SKIP
+  - export CIBW_ENVIRONMENT='PATH="$HOME/rust/bin:$PATH"'
+  - cibuildwheel --output-dir wheelhouse
+  - |
+    if [[ $TRAVIS_TAG ]]; then
+      $PIP install twine
+      $PYTHON -m twine upload wheelhouse/*.whl
+    fi

appveyor.yml

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+environment:
+  TWINE_USERNAME: michael.sanders
+  matrix:
+    # Stable 64-bit MSVC
+    - channel: stable
+      target: x86_64-pc-windows-msvc
+      CIBW_SKIP: "*win32* cp27-* cp33-* cp34-*"
+      CIBW_BEFORE_BUILD: pip install setuptools-rust
+    # Stable 32-bit MSVC
+    - channel: stable
+      target: i686-pc-windows-msvc
+      CIBW_SKIP: "*win_amd64* cp27-* cp33-* cp34-*"
+      CIBW_BEFORE_BUILD: pip install setuptools-rust
+
+
+# From https://github.com/starkat99/appveyor-rust/blob/master/appveyor.yml
+install:
+  - appveyor DownloadFile https://win.rustup.rs/ -FileName rustup-init.exe
+  - rustup-init -yv --default-toolchain nightly --default-host %target%
+  - set PATH=%PATH%;%USERPROFILE%\.cargo\bin
+  - rustc -vV
+  - cargo -vV
+  - pip install cibuildwheel==0.9.4 setuptools_rust
+
+build_script:
+  - cibuildwheel --output-dir wheelhouse
+  - >
+    IF "%APPVEYOR_REPO_TAG%" == "true"
+    (
+    python -m pip install twine
+    &&
+    python -m twine upload 'wheelhouse/*.whl'
+    )
+
+artifacts:
+  - path: "wheelhouse\\*.whl"
+    name: Wheels

scripts/travis

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+#!/usr/bin/env bash
+
+# From https://github.com/benfred/py-cpp-demangle/blob/13a22fd/ci/install_rust.sh
+# https://www.benfrederickson.com/writing-python-extensions-in-rust-using-pyo3/
+if [ ! -d ~/rust-installer ]; then
+    set -x
+    mkdir ~/rust-installer
+    curl -sL https://static.rust-lang.org/rustup.sh -o ~/rust-installer/rustup.sh
+    sh ~/rust-installer/rustup.sh --prefix=~/rust --spec=nightly --disable-sudo -y
+    set +x
+fi
+
+if command -v yum; then
+    yum install -y gpg libXtst libXtst-devel libXext libXext-devel
+fi