maintainers.txt: merge r81701 (add Nathan Ridge as sub-maintainer of Boost.Range) from trunk

[SVN r82137]

libs/maintainers.txt

@@ -86,7 +86,7 @@ proto                 Eric Niebler <eric -at- boostpro.com>
 ptr_container         Thorsten Ottosen <nesotto -at- cs.auc.dk>
 python                Ralf Grosse-Kunstleve <rwgrosse-kunstleve -at- lbl.gov>, Ravi Rajagopal <lists_ravi -at- lavabit.com>
 random                Steven Watanabe <watanabesj -at- gmail.com>
-range                 Neil Groves <neilgroves -at- googlemail.com>
+range                 Neil Groves <neilgroves -at- googlemail.com>, Nathan Ridge <zeratul976 -at- hotmail.com>
 ratio                 Vicente J. Botet Escriba <vicente.botet -at- wanadoo.fr>
 rational              Jonathan Turkanis <turkanis -at- coderage.com>
 regex                 John Maddock <john -at- johnmaddock.co.uk>