Fix margins on project show view
Make the countdown start right when the first lesson is viewed
Add helper functions for projects and project statuses
Allow the user to start from the project countdown
Move required attribute to submission contexts from code submissions
Add scoping to submission contexts
Fix logic for showing the countdown
Merge pull request #851 from teamleada/mark-image-submit

New project index page, new project show page, new profile project page, new cover photos