DNE and move all of DNE into the DotNetEngine directory. Remove references
that would cause the script runtime to load the entire engine + scene into
each script appdomain. This might help DNE memory consumption.
The binaries are still different, but that is only a small step away now.
The OSSLPrim has been removed. This commit will breal all scripts
using Prim.Scale(), etc, syntax. It was not secure and will have to
be brought back in another form.
and makes it use a common set of types in both engine. Fixes the issues with
running both engines and HTTP requests / listens / timers etc..
Also fixes a couple of minor Scene issues and a CTB by nullref.
