Author: Damyon Wiese
MDL-2283: Display number of assignment submissions that need grading in the grading summary
http://git.moodle.org/gw?p=moodle.git;a=commit;h=f70079b9bf6fc5097ad96e57efd40ef4a9ea35f0
http://github.com/moodle/moodle/commit/f70079b9bf6fc5097ad96e57efd40ef4a9ea35f0
+ 2.4 en [numberofsubmissionsneedgrading,mod_assign]