Roadmap for v3

[maranomynet]

• Simplify all the things. Remove superfluous features:
  • Remove support for dynamic group reconfigurations
  • Move from class/OOP to simpler factory function
  • Remove formatchange/jquery and formatchange/makeGroups
  • Remove withMediaProps
  • Remove Options.elmTagName
  • Stop exposing formatGroups on the returned instance
• Better coding practices:
  • Make private variables actually private
  • Flag media object as Readonly<>
    (Continue to keep track of this.oldFormat outside of media)
• Features:
  • Allow optionally throttling the resize event
• Half-baked ideas:
  • Remove ability to toggle on/off status
  • Handle montitored elm being removed from DOM
• Chores:
  • Rewrite README.md to reflect changes