Add Appveyor support

appveyor.yml

@@ -0,0 +1,71 @@
+platform: x64
+
+environment:
+ matrix:
+  - DC: ldc
+    DVersion: 1.1.0-beta2
+    arch: x64
+  - DC: ldc
+    DVersion: 1.0.0-beta2
+    arch: x64
+
+skip_tags: true
+branches:
+  only:
+    - master
+
+install:
+  - ps: function SetUpDCompiler
+        {
+          echo "downloading ...";
+          if($env:arch -eq "x86"){
+            $env:DConf = "m32";
+          }
+          elseif($env:arch -eq "x64"){
+            $env:DConf = "m64";
+          }
+          $env:toolchain = "msvc";
+          $version = $env:DVersion;
+          Invoke-WebRequest "https://github.com/ldc-developers/ldc/releases/download/v$($version)/ldc2-$($version)-win64-msvc.zip" -OutFile "c:\ldc.zip";
+          echo "finished.";
+          pushd c:\\;
+          7z x ldc.zip > $null;
+          popd;
+        }
+  - ps: SetUpDCompiler
+  - powershell -Command Invoke-WebRequest https://code.dlang.org/files/dub-1.0.0-windows-x86.zip -OutFile dub.zip
+  - 7z x dub.zip -odub > nul
+  - set PATH=%CD%\%binpath%;%CD%\dub;%PATH%
+  - dub --version
+
+before_build:
+  - ps: if($env:arch -eq "x86"){
+            $env:compilersetupargs = "x86";
+            $env:Darch = "x86";
+          }
+        elseif($env:arch -eq "x64"){
+            $env:compilersetupargs = "amd64";
+            $env:Darch = "x86_64";
+        }
+  - ps:
+        $version = $env:DVersion;
+        $env:PATH += ";C:\ldc2-$($version)-win64-msvc\bin";
+        $env:DC = "ldmd2";
+  - ps: $env:compilersetup = "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall";
+  - '"%compilersetup%" %compilersetupargs%'
+
+
+
+test_script:
+ - echo %PLATFORM%
+ - echo %Darch%
+ - echo %DC%
+ - echo %PATH%
+ - '%DC% --version'
+ - dub test --arch %Darch% dplug:core
+ - dub test --arch %Darch% dplug:client
+ - dub test --arch %Darch% dplug:host
+ - dub test --arch %Darch% dplug:vst
+ - dub test --arch %Darch% dplug:dsp
+ - dub test --arch %Darch% dplug:gui
+ - dub test --arch %Darch% dplug:window