Update Travis, add Appveyor

Update Travis to test 0.3 - 0.5, add Windows tests as well. Will inform
next tagged version REQUIRES

.travis.yml

@@ -1,8 +1,15 @@
 language: julia
 os:
-   - linux
-julia:
-   - release
-   - nightly
+  - linux
+  - osx
 notifications:
-  email: false
+  email: false
+julia:
+  - 0.3
+  - 0.4
+  - 0.5
+  - nightly
+before_install:
+  - if [[ -a .git/shallow ]]; then git fetch --unshallow; fi
+script:
+  - julia -e 'Pkg.init(); Pkg.clone(pwd()); Pkg.test("Codecs")'

appveyor.yml

@@ -0,0 +1,38 @@
+environment:
+  matrix:
+  - JULIAVERSION: "julialang/bin/winnt/x86/0.3/julia-0.3-latest-win32.exe"
+  - JULIAVERSION: "julialang/bin/winnt/x64/0.3/julia-0.3-latest-win64.exe"
+  - JULIAVERSION: "julialang/bin/winnt/x86/0.4/julia-0.4-latest-win32.exe"
+  - JULIAVERSION: "julialang/bin/winnt/x64/0.4/julia-0.4-latest-win64.exe"
+  - JULIAVERSION: "julialang/bin/winnt/x86/0.5/julia-0.5-latest-win32.exe"
+  - JULIAVERSION: "julialang/bin/winnt/x64/0.5/julia-0.5-latest-win64.exe"
+  - JULIAVERSION: "julianightlies/bin/winnt/x86/julia-latest-win32.exe"
+  - JULIAVERSION: "julianightlies/bin/winnt/x64/julia-latest-win64.exe"
+
+branches:
+  only:
+    - master
+    - /release-.*/
+
+notifications:
+  - provider: Email
+    on_build_success: false
+    on_build_failure: false
+    on_build_status_changed: false
+
+install:
+# Download most recent Julia Windows binary
+  - ps: (new-object net.webclient).DownloadFile(
+        $("http://s3.amazonaws.com/"+$env:JULIAVERSION),
+        "C:\projects\julia-binary.exe")
+# Run installer silently, output to C:\projects\julia
+  - C:\projects\julia-binary.exe /S /D=C:\projects\julia
+
+build_script:
+# Need to convert from shallow to complete for Pkg.clone to work
+  - IF EXIST .git\shallow (git fetch --unshallow)
+  - C:\projects\julia\bin\julia -e "versioninfo();
+      Pkg.clone(pwd(), \"Codecs\"); Pkg.build(\"Codecs\")"
+
+test_script:
+  - C:\projects\julia\bin\julia --check-bounds=yes -e "Pkg.test(\"Codecs\")"