ignore vs2010 stuff

windows/vcpp2010/.gitignore

@@ -1,9 +1,17 @@
+# files to be ignored:
+# http://stackoverflow.com/questions/2538149/what-should-be-contained-in-a-global-subversion-ignore-pattern-for-visual-studio
+# http://stackoverflow.com/questions/3922660/which-visual-c-file-types-should-be-committed-to-version-control
+# http://msdn.microsoft.com/en-us/library/3awe4781%28v=VS.100%29.aspx
+
 *.user
 *.ncb
 *.suo
+*.sdf
+*.opensdf
 Debug
 Release
 examples/*.user
 examples/*.ncb
 examples/Debug
 examples/Release
+ipch/*