[opendk][s]: featured groups on home page

[sagargg-zz]

• svg icons added
• hardcoded url path changed

[anuveyatsu]

@sagargg this isn't what we want to do. We don't want to hardcode these groups/collections but get them dynamically from the API and show them based on the tag "featured". If we have more than 4 "featured" groups, we want to show random 4 of them.

[sagargg-zz]

@anuveyatsu I'm not sure but as you said overriding the controlles isn't right way to do that. So, ATM i just added hardcoded. I think we should find out other way to extend the controller rather than overriding.

[anuveyatsu]

@sagargg I think we should close this PR and create a new one. But first we need to fix #86

[sagargg-zz]

Closed ATM