Git commits in Moodle 2.6.4 by Daniel Thies

commit 07a50c2f29c8f088a24585f504627d5d77648d6c
Author: Daniel Thies <dthies@ccal.edu>
Date:   Sat, 03 May 2014 11:25:49 +0800
Tag:    v2.6.4

 MDL-45044 filter_tex: properly escape excutable pathnames for Windows