Fix phony targets in 6lbr and 6lbr-demo makefiles
Add 6lbr-demo binaries to .gitignore
Allow selection of cc2538 firmware type
Print channel and pan-id at boot for cc2538
Update cetic testbed target
Reset nopath_received flag when new DAO is received
rpl_add_route must update existing route when next_hop changes
Add radio-sensor for cc2538dk
Add nvm support for 6lbr-demo (cc2538dk only)
Add cc2538 radio-sensor to coap radio resource
Update ipso profile and improve device resources
Update 6lbr-demo project-conf.h with new coap resources