Have a list of sponsors on our website

[bhavin192]

Currently we rely on meetup.com to show the venue and other sponsors. They seem to have put up a limit on how many organizations we can list there (only 15).

In addition to listing 15 entries there, we should have a page with all the sponsors on our website. Basically, we can keep the latest 14 on meetup.com, and have our sponsors page in that list of 15.

Checklist

• Add a sponsors page to the website website-theme#2 Modify the theme to be able to list the sponsors.
• Update this repository with a list of sponsors (add data/sponsors.yaml)
• Update meetup.com page to have our sponsors page as one of the sponsor, so that people can check previous sponsors.