Git commits in Moodle 2.6.6 by Matt Petro

commit c866f963ce8389c1f3d99c381717f2c21b6c3072
Author: Matt Petro <petro@engr.wisc.edu>
Date:   Wed, 17 Sep 2014 01:14:26 +0800
Tag:    v2.6.6

MDL-47270 core_component: make cache independent of filesystem ordering