* Prebuild will now define the VISUAL_STUDIO symbol in .csproj files while leaving NAnt files alone
* A conditional was added to use the .NET ReaderWriterLockSlim for VS compiles and the one in OpenMetaverseTypes for Mono compiles. This is a kludge until everyone is running Mono 2.6 or later (hah)
git-svn-id: http://libopenmetaverse.googlecode.com/svn/libopenmetaverse/trunk@2769 52acb1d6-8a22-11de-b505-999d5b087335
