* Added log4net dependency to physxplugin in prebuild.xml.
* Added missing m_log fields to classes.
* Replaced Console.WriteLine with appropriate m_log.Xxxx
* Tested that nant test target runs succesfully.
* Tested that local opensim sandbox starts up without errors.
* This is Diva's hypergrid patch, as perviously discussed on the opensim-dev mailing list
* Applied some minor prebuild.xml jiggling to resolve a dependency issue
* Thanks Diva!