Added the format and uniqueness constraint for email validation.
Removed trailing td>. Was adding unncessary text
No need of 'show' link either and extra table header
Added layman styling for registrations index
Added migration for private email on registrations. default is false
Added private field in form and corresponding controller.
Change info for Saleem Anasari.
Merge pull request #6 from AnkurGel/fix_email_uniqueness

Added the format and uniqueness constraint for email validation.
Merge pull request #7 from AnkurGel/private_email

Registrations Refactoring