Projects display whether they are funded.
Cosmetic changes to User show page
Removes pledge button if project end date has passed
Refactoring project methods
Added project end date display method and updated Project show view.
On Projects show page: displays how many days are left before end date.
User show page displays projects the user owns
Added start_date and end_date fields to new project form
Minor formatting changes in new project form and tier_fields form
Added new project validations