Add destroy method

[jharding]

This will allow typeaheads to be reinitialized:

// create
$('.typeahead').typeahead({ /* ... */ });

// destroy
$('.typeahead').typeahead('destroy');

// create again, this time with different datasets/settings
$('.typeahead').typeahead({ /* ... */ });

I need to add some tests, but the code should be good to go. It'll fix #41.

Also, I fixed a bug that prevented the undocumented ttl_ms option from being set to 0.

[timtrueman]

Why a suffix instead of a prefix? Does this.$menu.off('.tt'); not work with prefixes? Just curious because I haven't seen this before…

[jharding]

http://docs.jquery.com/Namespaced_Events

[timtrueman]

Awesome, thanks for the link.

[timtrueman]

Looks good. Do you think this is worth testing if we can only test each individual destroy method and not the whole?

[jharding]

I was going to use this to start a little integration test suite... we'll see how that goes.

[timtrueman]

Sounds good. Would that be something that could run in Travis?

[jharding]

Yeah, it'd still be written using Jasmine. Basically I would just initialize typeaheads and inspect some properties to make sure things are as expected. It'd be pretty dumb, but it'd probably be useful to have.

[jharding]

Eh might hold off on the integration tests, for now I just added some unit tests.