A serializer implements `extractEmbeddedData` to retrieve embedded
associations data
Capture and log errors from promise chains

The thrown error never sees the light of day because it's treated as
promise rejection and **not** a failure. I encournted this problem when
ED was erroring _internally_ trying to sideload association. The
serializer raised an exception (inside a then callback) that was
swallowed.
Merge pull request #995 from ahawkins/log-promise-errors

Capture and log errors from promise chains
Merge pull request #893 from Cyril-sf/fix_name_in_serializer

A serializer implements `extractEmbeddedData` to retrieve embedded associations data
ajax call in RESTAdapter now correctly provides run-loops