Git commits in Moodle 2.7.4 by Matt Petro

commit ad2cacf152e5be1442f3e97617e020a729f09095
Author: Matt Petro <petro@engr.wisc.edu>
Date:   Wed, 03 Dec 2014 01:59:52 +0800
Tag:    v2.7.4

MDL-48235 mod_assign: Fix reopen until pass behavior


commit d05cc63706124046e9c79469db59ead9e30c1949
Author: Matt Petro <petro@engr.wisc.edu>
Date:   Fri, 19 Sep 2014 11:35:27 +0800
Tag:    v2.7.4

MDL-47323 backup: added enrol plugin backup structure and annotation