#MongoDB

I figured out how to build your project on #TravisCI with different versions of
#MongoDB:
https://github.com/coderbyheart/Agora/blob/f2929c5235a36ee26e2b5dba301fa46183356237/.travis.yml#L16

@old_sound
@igorwesome #MongoDB has tailable cursors:
http://l.tckr.cc/MaTM6o