Version 2.0

Added new Discover devices function which finds Hapcan devices in the bus. Once devices are found they are stored in a configuration node, so the discover function should be used only when Hapcan network is somehow changed. Devices list is then used in nodes for quick device selection - no need to set node and group anymore! But You can if You want.

There is also new frames receiving algorithm implemented, which should be shorter frames proof. This frames emitted by Hapcan programmer when connecting to the bus cause invalid frame errors and broke whole receiving mechanizm.