Fix runprebuild.bat on Windows 7 systems and later

MS changed Windows 7 "reg query" command to spit out fewer lines in its preamble
Annoyingly there is no option to print raw values and not this preamble.
So now using the Windows find command.
But this has the side effect of stopping this working with Cygwin as it uses its own GNU find command.
Might fix in the future but not simple since Windows find itself is in different locations
Get runprebuild.sh to generate a vs2010 for xbuild to work with .NET 4 rather than vs2008

At least since 2009, Monodevelop has been able to load vs2010 files as well
Merge branch 'master' of ssh://opensimulator.org/var/git/opensim
Update OpenSim.32BitLaunch.exe and Robust.32BitLaunch.exe to .NET 4 versions.

Also fixes some issues in associated solution files
Fix bug where removing a physical linkset would only decrement the Active Objects statistic by 1 instead of by the number of prims removed.

Unlike LL, OpenSimulator currently uses this stat to record the number of prims in the physics simulation, even when they are at rest.
Added regression test for this case.
Merge branch 'master' of ssh://opensimulator.org/var/git/opensim
Merge branch 'master' into varregion
If a local land ID is given to the "land show" command, then output to console the full details of that parcel.

Using "land show" without a land ID still outputs a summary of parcels in the region
refactor: replace verbose checks with String.IsNullOrEmpty where applicable.

Thanks to Kira for this patch from http://opensimulator.org/mantis/view.php?id=6845
update libomv to 1538d3088e79ff0a9abea6905b487755b6890a85 in hope that it fixes some bulletsim issues on linux
Merge branch 'master' of ssh://opensimulator.org/var/git/opensim
Merge branch 'master' into varregion