adding migration for grader option
adding grader option to titanic and health care
project model uses helper to grade
adding helper grader
fixing spacing in enum in Project modl
schema updae
grader sanitizes solution now
adding sample submission for health proj
fixing nil answer bug
Merge pull request #1277 from teamleada/tristan_fix_interview_view

fixing nil answer bug
adding healthcare solution
renaming to proper solution for mini challenge
project controller uses the new project score system
QA-ed grading helper
project model checks score using ProjectScore
fix typo
checking that accepts comma
Merge pull request #1279 from teamleada/tristan_quiz_solution_matching

checking that accepts comma
fixing abbreviation
changing to grade_method