setup CI for Windows

.appveyor.yml

@@ -0,0 +1,34 @@
+platform:
+  - x64
+  - x86
+
+environment:
+  matrix:
+    - RUST_VERSION: 1.3.0
+      VENDOR: gnu
+    - RUST_VERSION: 1.3.0
+      VENDOR: msvc
+    - RUST_VERSION: beta
+      VENDOR: gnu
+    - RUST_VERSION: beta
+      VENDOR: msvc
+
+install:
+  - ps: |
+      if ($env:PLATFORM -eq "x86") {
+          $arch = "i686"
+      }
+      else {
+          $arch = "x86_64"
+      }
+      Start-FileDownload "https://static.rust-lang.org/dist/rust-${env:RUST_VERSION}-$arch-pc-windows-${env:VENDOR}.exe" -FileName rust-install.exe
+  - rust-install.exe /VERYSILENT /NORESTART /DIR="C:\Program Files (x86)\Rust"
+  - SET PATH=%PATH%;C:\Program Files (x86)\Rust\bin
+  - rustc -V
+  - cargo -V
+
+build: false
+
+test_script:
+  - cargo build --verbose
+  - cargo test --verbose