Update binary installation for Visual Studio 2012.

git-svn-id: svn+ssh://portal-auth.nersc.gov/project/projectdirs/visit/svn/visit/trunk@21919 18c085ea-50e0-402c-830e-de6fd14e8384
Fixed a problem with the work item being deleted twice in threaded mode.
Also added back the Update Progress update during the ExecuteDataTree function.

I have also ported my changes to VTK5 to VTK6. I will post these changes to the VisIt User site.
VTK6.1 should have these changes to make it thread safe.



git-svn-id: svn+ssh://portal-auth.nersc.gov/project/projectdirs/visit/svn/visit/trunk@21920 18c085ea-50e0-402c-830e-de6fd14e8384