MAINTAINERS: add Communication section

Add Twitter with myself (Lou Logan) as maintainer.

Add Google+ with Paul B Mahol, Michael Niedermayer, and Alexander
Strasser as maintainers.

Move website and mailinglists from Miscellaneous Areas to
Communication.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

MAINTAINERS

@@ -44,15 +44,22 @@ Miscellaneous Areas
 ===================
 
 documentation                           Mike Melanson
-website                                 Robert Swain, Lou Logan
 build system (configure,Makefiles)      Diego Biurrun, Mans Rullgard
 project server                          Árpád Gereöffy, Michael Niedermayer, Reimar Döffinger, Alexander Strasser
-mailinglists                            Michael Niedermayer, Baptiste Coudurier, Lou Logan
 presets                                 Robert Swain
 metadata subsystem                      Aurelien Jacobs
 release management                      Michael Niedermayer
 
 
+Communication
+=============
+
+website                                 Robert Swain, Lou Logan
+mailinglists                            Michael Niedermayer, Baptiste Coudurier, Lou Logan
+Google+                                 Paul B Mahol, Michael Niedermayer, Alexander Strasser
+Twitter                                 Lou Logan
+
+
 libavutil
 =========