Merge pull request #83 from divined2004/master

weighted grade calculation
work for task 75
finished issue #65
Delete tools.php~
Delete messages.inc.php~
Delete index.php~
Merge pull request #85 from DimKon7/master

Προσθήκη εργαλείου ρυθμίσεων κριτή στη διαχείριση πλατφόρμας
Merge branch 'task75' of https://github.com/grglaz/openeclass into grglaz-task75

Conflicts:
	modules/work/index.php
Merge branch 'grglaz-task75'
Remove README.md.