Merge pull request #48 from fancycode/appveyor-vc9

Also run CI against Visual Studio 2008.

appveyor.yml

@@ -7,6 +7,10 @@ os:
 
 environment:
   matrix:
+    - GENERATOR: "Visual Studio 9 2008"
+      UNICODE: ON
+    - GENERATOR: "Visual Studio 9 2008"
+      UNICODE: OFF
     - GENERATOR: "Visual Studio 10 2010"
       UNICODE: ON
     - GENERATOR: "Visual Studio 10 2010"

scripts/run-appveyor.bat

@@ -3,6 +3,10 @@ setlocal
 
 if /I "%PLATFORM%" == "x64" (
     set CMAKE_GEN_SUFFIX= Win64
+    if /I "%GENERATOR%" == "Visual Studio 9 2008" (
+        echo Skipping %CONFIGURATION% build using %GENERATOR%%CMAKE_GEN_SUFFIX% on %PLATFORM%
+        exit 0
+    )
 ) else (
     set CMAKE_GEN_SUFFIX=
 )