Added first version for digital receiver UNB1 back node

applications/dig_receiver/designs/dig_receiver_bn/hdllib.cfg

...designs/dig_receiver_bn/quartus/sopc_dig_receiver_bn.sopc

...eiver/designs/dig_receiver_bn/src/tcl/dig_receiver_bn.tcl

.../designs/dig_receiver_bn/src/tcl/dig_receiver_bn_pins.tcl

...ig_receiver/designs/dig_receiver_bn/src/vhdl/adc_lvds.vhd

..._receiver/designs/dig_receiver_bn/src/vhdl/dig_rec_bn.vhd

...iver/designs/dig_receiver_bn/src/vhdl/dig_receiver_mm.vhd

...er/designs/dig_receiver_bn/src/vhdl/node_dr_1st_stage.vhd

...esigns/dig_receiver_bn/src/vhdl/sopc_dig_receiver_bn.sopc