CKImageview :  when interactive is YES, we keep the button in the hierarchy to allow interactions even if the imageURL is invalid (not well formatted) as the imageLoader do not send callbacks in this case.
Foundation.h : adds CXMLDocument.h in foundation headers.
Bindings : Assert if bindings are created or contexts are opened outside of the main thread.

We just discovered that creating bindings and opening bindings context is not thread safe. We'll assert in this case to be aware of this and ensure we do not get random crashes.