ipv6 plans for ns-3

Sebastien,
I'd like to put the IPv6 code back on track for merging into ns-3-dev.  Can
you please provide a status update on the repos that you or your group are
maintaining at https://svnet.u-strasbg.fr/hg/ and what you might suggest
for next steps?  Also, I'd like to know where the effort to refactor the
transport protocols and network layer to allow a common transport protocol
implementation to use IPv4 and IPv6 ended up-- I see that the current
ns-3-ipv6 repo has separate IPv4 and IPv6 implementations for TCP.

Thanks,
Tom