Add several new project concern Ethernet and RF433 transmitter

Added project:
Ethernet_ATmega16, Ethernet_ATmega8,
Ethernet_ATmega16_webserver, Ethernet_ATmega16_webserver,
Test_C project with JUnits for CRC16 related functions.

Update for:
RF_ATmega16_Receiver:
 - Added CRC16 functions prototypes,

RF_ATmega8_Transmitter:
 - disable interrupts
RF_ATmega8_Transmitter, RF_ATmega16_Receiver, upgrade protocol - add CRC16

Add convenient functions for decode and encode RF frame:
- stDecodeFrame,
- ucEncodeFrame.