Add the Babel routing protocol (RFC 6126)
This patch implements the IPv6 subset of the Babel routing protocol.Based on the patch from Toke Hoiland-Jorgensen, with some heavymodifications and bugfixes.
Thanks to Toke Hoiland-Jorgensen for the original patch.
Initial BFD commit, work in progress.
Implements Router Advertisement protocol.
Documented all the trivial protocols.
Updated all the Doc files to new format.
Added skeleton Doc files for the whole developer's documentation.