2.1.1 - 2016.02.22

• Some Promise improvements:
  • Feature detection:
    • Added detection unhandled rejection tracking support - now it's available everywhere, #140
    • Added detection @@species pattern support for completely correct subclassing
    • Removed usage Object.setPrototypeOf from feature detection and noisy console message about it in FF
  • Promise.all fixed for some very specific cases