Update maintainer list.

libs/maintainers.txt

@@ -20,6 +20,7 @@ asio                  Chris Kohlhoff <chris -at- kohlhoff.com>
 assert                Peter Dimov <pdimov -at- pdimov.com>
 assign                Thorsten Ottosen <nesotto -at- cs.auc.dk>
 atomic                Helge Bahmann <hcb -at- chaoticmind.net>, Tim Blechmann <tim -at- klingt.org>, Andrey Semashev <andrey.semashev -at- gmail.com>
+beast                 Vinnie Falco <vinnie.falco@gmail.com>
 bimap                 Matias Capeletto <matias.capeletto -at- gmail.com>
 bind                  Peter Dimov <pdimov -at- pdimov.com>
 chrono                Vicente J. Botet Escriba <vicente.botet -at- wanadoo.fr>
@@ -79,6 +80,7 @@ logic                 Douglas Gregor <dgregor -at- cs.indiana.edu>
 math                  Hubert Holin <Hubert.Holin -at- meteo.fr>, John Maddock <john -at- johnmaddock.co.uk>
 metaparse             Abel Sinkovics <abel -at- elte.hu>
 move                  Ion Gaztanaga <igaztanaga -at- gmail.com>
+mp11                  Peter Dimov <pdimov -at- pdimov.com>
 mpi                   K. Noel Belcourt <kbelco -at- sandia.gov>, Alain Miniussi <alain.miniussi -at- oca.eu>
 mpl                   Aleksey Gurtovoy <agurtovoy -at- meta-comm.com>
 msm                   Christophe Henry <christophe.j.henry -at-  googlemail.com>