Allow student to toggle shared setting of badges.
Marke EarnedBadges as shared/not shared.

Remove previous migration to add 'shared' to Badges table.
Ensure correct EarnedBadge record is found.
Share badge button styling.
Only show share option if 'Social Badges' is turned on.
Remove button formatting and fix reload error.
Fix display of Total Badge Score on student dashboard.
Remove 'total badge score' from class achievements table.
Merge pull request #378 from bellotastudios/badges

Shared Badges