Functional changes
Functional changes

- bit-rate values are now handled in bit/s, the pre-defined values can
still be used (but they are converted in bit/s)
- new method frameSize() which returns the number of bits of data frames
- inside onTimerEvent() the reading of CAN messages now stops if the
receive queue is empty
- fixed calculation of frame statistics
canpie/CANpie,canpie/CANpie,JoTid/CANpie,JoTid/CANpie,JoTid/CANpie,canpie/CANpie