Appveyor CL added + Appveyor button in README.md file

Author: MartinOtter

README.md

@@ -1,6 +1,7 @@
 # Modia.jl
 
 [![Travis](https://travis-ci.org/ModiaSim/Modia.jl.svg?branch=master)](https://travis-ci.org/ModiaSim/Modia.jl)
+[![AppVoyer](https://ci.appveyor.com/api/projects/status/github/ModiaSim/Modia.jl?svg=true)](https://ci.appveyor.com/project/MartinOtter/modia-jl)
 [![Coverage Status](https://coveralls.io/repos/github/ModiaSim/Modia.jl/badge.svg?branch=master)](https://coveralls.io/github/ModiaSim/Modia.jl?branch=master)
 [![codecov.io](http://codecov.io/github/ModiaSim/Modia.jl/coverage.svg?branch=master)](http://codecov.io/github/ModiaSim/Modia.jl?branch=master)
 [![The MIT License](https://img.shields.io/badge/license-MIT-brightgreen.svg?style=flat-square)](https://github.com/ModiaSim/Modia.jl/blob/master/LICENSE)

appveyor.yml

@@ -0,0 +1,43 @@
+environment:
+  matrix:
+  #- julia_version: 0.6
+  - julia_version: 1
+  #- julia_version: nightly
+
+platform:
+  #- x86 # 32-bit
+  - x64 # 64-bit
+
+# # Uncomment the following lines to allow failures on nightly julia
+# # (tests will run but not make your overall status red)
+# matrix:
+#   allow_failures:
+#   - julia_version: nightly
+
+branches:
+  only:
+    - master
+    - /release-.*/
+
+notifications:
+  - provider: Email
+    on_build_success: false
+    on_build_failure: false
+    on_build_status_changed: false
+
+install:
+  - ps: iex ((new-object net.webclient).DownloadString("https://raw.githubusercontent.com/JuliaCI/Appveyor.jl/version-1/bin/install.ps1"))
+
+build_script:
+  - echo "%JL_BUILD_SCRIPT%"
+  - C:\julia\bin\julia -e "%JL_BUILD_SCRIPT%"
+
+test_script:
+  - echo "%JL_TEST_SCRIPT%"
+  - C:\julia\bin\julia -e "%JL_TEST_SCRIPT%"
+
+# # Uncomment to support code coverage upload. Should only be enabled for packages
+# # which would have coverage gaps without running on Windows
+# on_success:
+#   - echo "%JL_CODECOV_SCRIPT%"
+#   - C:\julia\bin\julia -e "%JL_CODECOV_SCRIPT%"