Add a IEEE 802.15.4 like decoder, which supports
the IEEE 802.15.4 standard but also a large variety
of ICs based on this framing scheme. Such framings
are quite common in many Cubesat missions.
The decoder has been tested an works well with at least
the Reaktor Hello World satellite
* Removed obsolete blocks
* Created a new CRC class with static methods. This will make easier the
integration of new CRC schemes. The old way was rather too C-styled