Increase member limit to 100

[asim]

A discussion on Hackernews led to the idea that "dunbars number" would be a better limit for number of people in a group e.g the number of people you can reasonably maintain a relationship with or remember the names of. I still personally think the number is too high, but we'll set to 100.

https://news.ycombinator.com/item?id=36298387