Added legitimate_user field to user disregard test/service and admin users when
aggregating data
Pluralized legitimate students
Set existing admin users to nonlegimative
Set admin to legitimate_student by default in seeds
Added tooltip description for submissions count
Naive test to check that submissions from non legitimate_students are
not added to total sumissions count
Unify syntax in seeds
Insert submission directly to db
Updated changelog
Merge pull request #187 from jamox/legitimate_student

Added legitimate student field to user