Encourage people to share felvin instant apps

[hargup]

• [ ] Show author(s) names and affiliation on the list of apps - Add this inside App Spec.
• [ ] (Stretch) Use the author name for filtering apps made by a author. So a page for apps created by Team Felvin.
• [ ] Encourage app creators to write blog posts on the app they create. Alternative, we can write a blog post for new apps, and talk about the creator as well.
• [ ] Show usage stats on the app page
• [ ] Show the name of the creator in the app preview