Add a azure pipelines CI script

Author: phil-opp

azure-pipelines.yml

@@ -0,0 +1,49 @@
+# Documentation: https://aka.ms/yaml
+
+strategy:
+  matrix:
+    linux:
+      image_name: 'ubuntu-16.04'
+      rustup_toolchain: nightly
+    mac:
+      image_name: 'macos-10.13'
+      rustup_toolchain: nightly
+    windows:
+      image_name: 'vs2017-win2016'
+      rustup_toolchain: nightly
+
+pool:
+  vmImage: $(image_name)
+
+steps:
+- bash: |
+    echo "Hello world from $AGENT_NAME running on $AGENT_OS"
+    echo "Reason: $BUILD_REASON"
+    echo "Requested for: $BUILD_REQUESTEDFOR"
+  displayName: 'Build Info'
+  continueOnError: true
+
+- script: |
+    curl https://sh.rustup.rs -sSf | sh -s -- -y --default-toolchain $RUSTUP_TOOLCHAIN
+    echo "##vso[task.setvariable variable=PATH;]$PATH:$HOME/.cargo/bin"
+  condition: or(eq( variables['Agent.OS'], 'Linux' ),  eq( variables['Agent.OS'], 'Darwin' ))
+  displayName: 'Install Rust (Linux/macOS)'
+
+- script: |
+    curl -sSf -o rustup-init.exe https://win.rustup.rs
+    rustup-init.exe -y --default-toolchain %RUSTUP_TOOLCHAIN%
+    echo ##vso[task.setvariable variable=PATH;]%PATH%;%USERPROFILE%\.cargo\bin
+  condition: eq( variables['Agent.OS'], 'Windows_NT' )
+  displayName: 'Install Rust (Windows)'
+
+- script: |
+    rustc -Vv
+    cargo -V
+  displayName: 'Print Rust Version'
+  continueOnError: true
+
+- script: cargo build
+  displayName: 'Build'
+
+- script: cargo test
+  displayName: 'Test'