FIX for issue 915, added median, number of fails and number of zeros to dashboard
FIX for issue 915, updated with French translations
FIX for issue 915, created a migration for adding result statistics in assignments
FIX for issue 915, updated comments and restored encoding information
FIX for issue 915, cleanup with 80 line length max
Merge pull request #998 from m-wu/issue-915

Added median, number of fails and number of zeros to dashboard.
Closes #915