 - renamed some things in Exportable so they work properly for subclasses  - tightened up crc24's loop slightly
 - renamed some things in Exportable so they work properly for subclasses
 - tightened up crc24's loop slightly

SecurityInnovation/PGPy,J08nY/PGPy,SecurityInnovation/PGPy,SecurityInnovation/PGPy,J08nY/PGPy