Changed email and author to team shoes

* steve is still there and supporting just not really active in
  development these days, I feel like "Team Shoes" represents
  us quite nicely :)
Add JRuby notice to gem description

* I did not find a way to specify an appropriate platform,
  there is 'java' but gems like warbler don't seem to do that
  and it might add -java to the gem name from what I
  gathered