replacing rtypes.h to correctly handle 64bit machines

replacing rtypes.h to correctly handle 64bit machines so derived type definitions work correctly. New rtypes.h is from operational rst branches from MSI/UAF radars

This is wholesale file replacement for the included rtypes.h file. New file is taken from operational rst code at MSI radar sites which correctly handled 64bit linux.

Long term, we should actually remove all use of rtypes.h based defines and replace them with calls to types defined in stdint.h as provided by the OS, in the pydavit codebase for better portability. The rtypes.h defines predate standardization of int types.