New major

[dereuromark]

We want to make a new major soon were we would then remove the deprecations we added:

• IdentifierCollection (Deprecate identifier collection approach. #712)

I would also like to see the following fixed up:

• CakeRouterUrl urlChecker (maybe called "Cake") auto defaults if we detect CakePHP context instead of "Default" ( 5607c7b )
• single URL by default, most apps only ever need a single app
  The array|string magic is not needed anymore then
  It internally accepts both string or array style as always in Cake
• A MultiUrl checker can be added to specifically support multiple loginUrls