Closes #246 #284 #285 #288 #289 #291 - Improved Fluo cluster management.

Pull request for  #246 #284 #285 #288 #289 #291
This is unfriendly in the case where a user is running multiple instances of fluo on a single node (like maybe running fluo 1.0 and 1.1 at the same time from different dirs).

I think this behaviour existed before your change?  If so should probably just open an issue to use pid files or java service wrapper...