Implementation of: [MS-OXRTFCP]: Rich Text Format (RTF) Compression Algorithm https://msdn.microsoft.com/en-us/library/cc463890(v=exchg.80).aspx
Converted C# version similar to the PYTHON https://github.com/delimitry/compressed_rtf project.
PYTHON library developed by: Dmitry Alimov (delimitry). Also credit to Sicos1977 (https://github.com/Sicos1977/MSGReader) for CRC32 code.