Visual C++ additions.

Grouped all VC++ files together. Added new file extensions and folders used by Visual C++ 2010.

Global/VisualStudio.gitignore

@@ -8,11 +8,16 @@
 # Build results
 Debug/
 Release/
-*.ncb
-*.aps
 *.obj
 .builds
 
+# Visual C++ cache files
+ipch/
+*.aps
+*.ncb
+*.opensdf
+*.sdf
+
 # ReSharper is a .NET coding add-in
 _ReSharper*