Ignore extract dirs and installer exe

git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@14722 c8812cc2-4d05-0410-92ff-de0c093fc19c

.gitignore

@@ -10,3 +10,6 @@ ms-windows/Installer-Files/postinstall.bat
 ms-windows/Installer-Files/preremove.bat
 ms-windows/osgeo4w/packages/
 ms-windows/osgeo4w/unpacked/
+ms-windows/*Setup.exe
+ms-windows/osgeo4w/nsis/
+ms-windows/osgeo4w/untgz/