Add "Help us make GopherJS better" section into the README.
Add "Help us make GopherJS better" section into the README.

Mainly I'd like to advertise the user survey more broadly to folks who are not following us in Twitter or Slack, but also list a few other ways to contribute to the project while I'm at it.
gopherjs/gopherjs,gopherjs/gopherjs,gopherjs/gopherjs,gopherjs/gopherjs,gopherjs/gopherjs