Highlighter used to get only text field of original JSON object, but still checked for displayField in item (which is string).
Fixed by passing whole JSON object to highlighter.
Improve how it use the ajax results and on selecting a item
Add options to use json into ajax results, choosing the label and value
Add the option to use a callback function on select an item, passing
the complete json item to callback.
Update readme file
Highlighter should original JSON item and highlight displayField value.