Visual Test Shell for BACnet SVN

Clean up a decoding bug with DNET numbers (being treated as a signed integer and then extended to 32 bits).

Script support for device object.

Automatic support for BACnet/IP style endpoints.

Bind scripting to device object.

Corrected some signed/unsigned warnings.

Messages that come down from the device need to look like they
were routed when the device doesn't "live" on the same adapter that
is going to be used to send the outbound message.

Building the library on MacOS X uses the GCC compiler, which came
up with a collection of errors and warnings. In the interest of compiling
clean on all platforms, these were fixed.

Not all cases had a return value in whatIsChoice function, so I corrected that. Also removed the unused choices from the calling function. Changed some global variables to local scope since they weren't used outside this module.

Removed the foreign pragma statements.
Corrected an unused parameter using (void).

Removed VTSQueue.CPP from the project file since the template is served via the header file.