Added container library

[SVN r74302]

libs/maintainers.txt

@@ -21,6 +21,7 @@ chrono                Vicente J. Botet Escriba <vicente.botet -at- wanadoo.fr>
 circular_buffer       Jan Gaspar <jano_gaspar -at- yahoo.com>
 concept_check         Jeremy Siek <jeremy.siek -at- gmail.com>
 config                John Maddock <john -at- johnmaddock.co.uk>
+container             Ion Gaztanaga <igaztanaga -at- gmail.com>
 conversion            Alexander Nasonov <alexander.nasonov -at- gmail.com>
 crc                   Daryle Walker <darylew -at- hotmail.com>
 date_time             Jeff Garland <jeff -at- crystalclearsoftware.com>