Author: Daniel Neis Araujo
MDL-50371 gradebook: gradepointdefault for manual itens and categories
http://git.moodle.org/gw?p=moodle.git;a=commit;h=b6d1812dd78caa9e2f389768096ac4659d4659ba
http://github.com/moodle/moodle/commit/b6d1812dd78caa9e2f389768096ac4659d4659ba
+ 3.0 en [gradepointdefault_help,core_grades]