• Standardize interface:
  browser ()
  device X _string()
  engine _version(), _major(), _minor(), _beta()
  os
  robot
  (andrewmoise)
  
• Add Galeon, Seamonkey, and Epiphany as specifically detected
  browsers (andrewmoise)
  
• Some internal changes that make things simpler and faster
  (andrewmoise)
  
• Remove the $check argument (e.g. $ua->beta('.45') to check
  whether the beta version is ".45") (andrewmoise)
  
• Update and reorganize documentation (andrewmoise)
  
• Breaking Change: remove deprecated user_agent($arg) usage.
  This is the reason for the major version bump.