When an option was for an object, and that object had a property with a
' in it, the html that is written out is invalid. In the callback
function when $(e.currentTarget).data("autocomplete") is used, some of
the properties would end up undefined. Encode ' as &#39; when writing
out the json value of an object.
Merge pull request #52 from belav/master

Encode ' in json output