Implement Appveyor Windows testing

appveyor.yml

@@ -0,0 +1,40 @@
+version: 0.21.{build}
+
+# Branches to build
+branches:
+  only:
+  - develop21
+
+# Specify platform for MySQL check
+platform:
+  - Win32
+  
+# By default, AppVeyor only comes with 64bit MySQL, but 32 bit compiler.
+# Download standalone MySQL libraries for compilation.
+# Probably not the best solution, but it works for now.
+install:
+  - ps: |
+    if ($env:platform -eq "Win32")
+    {
+      Invoke-WebRequest "http://dev.mysql.com/get/Downloads/MySQL-5.6/mysql-5.6.28-win32.zip" -OutFile mysql-5.6.28-win32.zip
+      7z e -y mysql-5.6.28-win32.zip mysql-5.6.28-win32/lib -o"C:\Program Files (x86)\MySql\MySQL Server 5.6\lib"
+      7z e -y mysql-5.6.28-win32.zip mysql-5.6.28-win32/include -o"C:\Program Files (x86)\MySql\MySQL Server 5.6\include"
+    }
+
+# Clone to the specified folder below, and only clone the latest commit without history.
+clone_folder: c:\mzero\server
+clone_depth: 1
+
+# Enable parallel builds to speed up the compilation process.
+build:
+  parallel: true
+
+# Initialize submodules.
+before_build:
+  - git submodule update --init --recursive
+ 
+# Build core.
+build_script:
+  - cd c:\mzero\server
+  - cmake -DCMAKE_INSTALL_PREFIX="c:\mzero\build\bin" -DCMAKE_SIZEOF_VOID_P=8
+  - msbuild /m MaNGOS.sln