Clarify the load order

The load order should be jQuery -> jQuery.turbolinks -> other scripts -> Turbolinks.

This ensures that the jquery.turbolinks hijacks $.fn.ready so that other scripts can consume it.

Turbolinks then needs to be at the end of all scripts that can attach click handlers to links so that it will not intercept link clicks that should've been handled by other scripts.
Merge pull request #18 from rstacruz/patch-2

Clarify the load order