- MAJOR: Drop hard when.js dependency in favor of ES6 Promise API. See https://github.com/cujojs/when/blob/master/docs/es6-promise-shim.md to use when.js as an ES6 Promise polyfill.
- MAJOR: AMD modules are no longer supported. curl.js users can use the cjsm11 loader, see https://github.com/cujojs/curl#api-at-a-glance
- Moved path token param replacement from the clients into the `rest/interceptor/params` interceptor, which is also deprecated. The behavior will no longer be applied automatically in the client. Using the `rest/interceptor/template` interceptor is far more powerful and preferred.
- Fixed an issue preventing uri template exploded values from expanding correctly.
- Update tested environments:
  - Android 5.1, 4.4 and 4.3
  - Chrome latest
  - Edge latest
  - Firefox latest, 45 ESR, 38 ESR
  - Node 0.10, 4, 6
  - IE 11
  - iOS 8 and 9
  - Safari 8 and 9
- Removed old IE XDomainRequest client and xhr and xdr interceptors
- mime interceptor no longer sets Content-Type on requests without an entity