Add lttng-relayd.8 to the Makefile.am
Create the proposals/ directory which contains pas and current proposals
(RFC) for any features/changes in lttng-tools code tree.
Add the streaming-howto.txt to the dist data.
Rename and update old RFCs and move them to proposals/ directory.
Incidently, remove the dev/ directory.
Signed-off-by: David Goulet <dgoulet@efficios.com>