Notes
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I am unsure what field of options may be used.
The options.query already seemed to be used, so started looking for
another field.

As I understand it, Adapter.find leaves the possibility of extra
fields on the options object unspecified. Therefore, I added the
fuzzyMatch field.

As a try out, I extend the fuzzy matching on relationship

 - Abstracted away relation filter parsing

 - Change filter[author.posts] to filter[author:posts].
   Ember (considered baseline use case) doesn't like parsing the former
   format in its queryParams parser.

See PR discussion remark fortunejs#35 (comment)

see:
  fortunejs#35 (comment)

…eature/wip-filtering-relationship