2.0.0

• Breaking changes:
  • use of origin as a parameter for publish, subscribe and unsubscribe has been moved to the chaining-function target(origin)
• Added:
  • events can be published with multiple arguments. If the last argument is a function, it is treated as a callback that subscribers can call.
  • include(popup) adds popups to the listing of frames to be messaged.
  • window.opener will now be included in framebus messaging, if available.