Git commits in Moodle 2.8.x by Nelson Moller

commit df0c2e957899654d744d7f41f5fea6b19c954c09
Author: Nelson Moller <nmoller@crosemont.qc.ca>
Date:   Fri, 14 Aug 2015 02:13:41 +0800
Tag:    v2.8.8

MDL-51090: mod_quiz grading validation of an essay question

commit 615d97944e69316c5f513c11d7dfa1e6f941cc88
Author: Nelson Moller <nmoller@crosemont.qc.ca>
Date:   Mon, 01 Jun 2015 23:03:19 +0800
Tag:    v2.8.7

MDL-49323 mod_assign: Fixed numeric validation in grade form.

commit 116dd8a02f8fa29b096d714c5e49357dc36c72da
Author: Nelson Moller <nmoller@cegepadistance.ca>
Date:   Thu, 22 Jan 2015 21:57:54 +0800
Tag:    v2.8.4

MDL-48929 repository_filesystem: Valide relative path against realpath