make Astropy Project contributors gallery

Notes copied and pasted from Coordination Meeting notes. (me and @taldcroft)
- Can just copy how Sunpy did it: http://sunpy.org/team.html
- Request headshot or other image
- Pic, Name, Github handle, Twitter username on gallery box.
- 150 words hover bio. About their contributions to the project. Optional: Where you work and work title/position.
- Coordination Committee first
- Anyone with a role: Core Developer and Leads and Deputies
- Any Contributor who self identifies as making a "substantial contribution" that wants to be added
- Divide up current site into Team = Roles and People
- Think about how to make it easy for people to contribute and edit their entry.
- Easy to search and find relevant bit of code
- Or contributor personalized file
- Guidelines for filename
- Maybe script a way to generate a bunch of files based on google form.
- Once a year call for new contributors - reopen google from, re-run script.
- Email to astropy-dev should ask for folks who have “contributed substantially to the Astropy Project”.