chore: Add AppVeyor integration (stub).

Author: pravic

.appveyor.yml

@@ -0,0 +1,46 @@
+version: 0.4.0.{build}
+
+branches:
+  only:
+    - master
+    - travis
+
+environment:
+  matrix:
+  - TARGET: Go 1.10.0
+    ARCH: 64
+    ARCHGO:
+    VERGO: 110
+    MGWVER: x86_64-7.2.0-posix-seh-rt_v5-rev1
+
+  - TARGET: Go 1.10.0
+    ARCH: 32
+    ARCHGO: -x86
+    VERGO: 110
+    MGWVER: i686-6.3.0-posix-dwarf-rt_v5-rev1
+
+install:
+  - cmd: echo Testing sciter%ARCH% with %TARGET%.
+  - cmd: echo Current directory is %APPVEYOR_BUILD_FOLDER%
+  - cmd: set PATH=C:\projects\deps;C:\go%VERGO%%ARCHGO%\bin;C:\mingw-w64\%MGWVER%\mingw64\bin;%PATH%
+  - cmd: echo %PATH%
+  - cmd: echo %GOPATH%
+
+  - gcc --version
+  - go version
+
+  - mkdir C:\projects\deps
+  - curl -so "C:\projects\deps\sciter.dll" "https://raw.githubusercontent.com/c-smile/sciter-sdk/master/bin/%ARCH%/sciter.dll"
+
+before_build:
+  - cmd: set GOPATH=%APPVEYOR_BUILD_FOLDER%
+
+
+build_script:
+  - cmd: cd
+  - cmd: dir
+
+
+test_script:
+  - cmd: cd
+  - go test