Fix bug where we did not get the name
Don't process whois messages unless HUBOT_WHOIS_SP is defined
Whois improvements

  * hubot replies to the person asking
  * Check if a user exits when in doubt
  * Remove the exists flag if a user used to have info but no longer does
Reset nagging when user no longer has details
Merge pull request #2 from ernesto-jimenez/master

Fixes and improvements