Add appveyor

appveyor.bat

@@ -0,0 +1,9 @@
+echo Test all
+cargo test --verbose --all
+
+if [%CHANNEL%] == [nightly] (
+  echo Bench lib
+  cd lib
+  cargo bench --verbose
+  cd ..
+)

appveyor.yml

@@ -0,0 +1,26 @@
+environment:
+  matrix:
+    - TARGET: i686-pc-windows-gnu
+      CHANNEL: stable
+    - TARGET: i686-pc-windows-msvc
+      CHANNEL: stable
+    - TARGET: x86_64-pc-windows-gnu
+      CHANNEL: stable
+    - TARGET: x86_64-pc-windows-msvc
+      CHANNEL: stable
+    - TARGET: x86_64-pc-windows-msvc
+      CHANNEL: beta
+    - TARGET: x86_64-pc-windows-msvc
+      CHANNEL: nightly
+
+install:
+  - appveyor DownloadFile https://win.rustup.rs/ -FileName rustup-init.exe
+  - rustup-init -yv --default-toolchain %CHANNEL% --default-host %TARGET%
+  - set PATH=%PATH%;%USERPROFILE%\.cargo\bin
+  - rustc -vV
+  - cargo -vV
+
+build: false
+
+test_script:
+  - appveyor.bat

lib/Cargo.toml

@@ -14,4 +14,6 @@ encodings (base64, base32, hex, etc.). See the documentation for more details.
 include = ["Cargo.toml", "src/lib.rs"]
 
 [badges]
+appveyor = { repository = "ia0/data-encoding" }
+coveralls = { repository = "ia0/data-encoding" }
 travis-ci = { repository = "ia0/data-encoding" }