implement Experiments.refFromCookie
Merge branch 'master' of github.com:prismicio/scala-kit

* 'master' of github.com:prismicio/scala-kit:
  Split Api.scala in multiple files
  Get started on tested doc snippets
  Include label as class in embed blocks
  Update README for version number
  Don't forget to close tags ending at the end of the block
  Update README for 1.1 and 1.2
fix A == Option[A]
unit test experiments
Doc tests
Merge branch 'master' into 1.1.x