* TokenList2DsnLexer.cmake now wraps each token enum in its own namespace. It
also no longer setup of the "using" directive in the header file, which was
bad behavior. C++ enum values will have name collisions unless the enums
themselves are different namespaces.
++new:
* Sweet library is now a DSO/DLL.
* Brought in SWIG to do a wrap of the Sweet DSO/DLL for unit testing
and scripting. The SWIG DSO/DLLs are built separate from the Sweet DSO/DLL
and are also optional.