Nominal keyword support... might be broken
Add a VTable to KeywordList for Python Bindings.
Add python variation of Datagram add_value
Remove unwanted std::cerr output.
Made significant improvements to Py_Datagram_add_value.
Added Py_DatagramIterator_read_value.
Remove extraneous subtypes.
Handle non-uinteger NumericRanges for Array ranges.
Add fixed-point conversion methods to Numeric.
Validate default values for Field/Parameter/etc...
Finish implementation of Value (refactor + implement TODOs).
Cleanup CMakeLists and testing framework.