Minor changes in look and feel of page

[ajiteshr7]

Added spacing between registration cards

[faheel]

It would be better to add the left and right margin in the registration-column class in custom.css than in the HTML.

[ajiteshr7]

changing registration-column class may cause confusion if it is used in future,
though adding a custom class will do the job.

[faheel]

Yeah, a custom class would be better.

[faheel]

Duplicate of #12