6LoWPAN-ND improvement code
6LoWPAN-ND improvement code
Fixed error retransmission 6LoWPAN-ND
Fixed error retransmission 6LoWPAN-ND
Static error compilation fixed
Regression test OK
Regression test updated
Merge branch 'refs/heads/dev' into dev_RPL

Conflicts:
	regression-tests/18-6lowpan-nd/script/context.js
	regression-tests/18-6lowpan-nd/script/crash.js
	regression-tests/18-6lowpan-nd/script/crash_br.js
	regression-tests/18-6lowpan-nd/script/duplication.js
	regression-tests/18-6lowpan-nd/script/move.js
	regression-tests/18-6lowpan-nd/script/prefix.js
	regression-tests/18-6lowpan-nd/script/topology-121.js
	regression-tests/18-6lowpan-nd/script/topology-132.js
	regression-tests/18-6lowpan-nd/script/unregister.js