Git commits in Moodle 2.6.2 by Oleg Sychev

commit c5a229c2f1d5d5f4c9ff0dd259f59ca8c420db39
Author: Oleg Sychev <oasychev@gmail.com>
Date:   Sat, 25 Jan 2014 07:41:01 +0800
Tag:    v2.6.2

MDL-42456: add Mercurial vcs support to plugin_external_source