so they are the same location as if being built under OpenSimulator.
Move library DLLs from "libs" to "bin" so they are in the same place
as under OpenSimulator builds.
Many changes to make things compile.
Update OpenSim libraries
Update libOpenMetaverse libraries
This completes the change from .NET Core to one of the Frameworks
in order to match whatever the OpenSimulator binaries needed.
Updated gatherLibs.sh to fetch both OpenSimulator and libOpenMetaverse
binaries from the OpenSimulator bin/ directory so that everything
matches.