Default ajax option is not null

[wimski]

In the option table it says the ajax option (whether object or string) is null by default. This isn't true, because in the $.fn.typeahead.defaults the ajax option is a predefined object. So unless you specifically tell your instance to have an ajax option of null, the ajax option will not be null. I came across this when the sorter method didn't seem to work. It turns out the sorting is skipped when the ajax option is set. I only used the source option, but it didn't sort until I specifically set the ajax option to null.

So either have the default value actually be null or edit the options table in the documentation to reflect the predefined ajax object.

[wimski]

Created a pull request for this issue. I added an extra check to see if the url property of the ajax option is set: pull request #40 Also added support for sorting objects.