Be more consistent across the whole codebase.

Also, make use of JSHint's 2.5.1 `extends` and `qunit` options. This way we set our basis options in js/.jshintrc and override the rest.

* register the callback before invoking the toggling
* listen for `hidden` instead of `hide`
* account for the possibility of the associated `show` event being preventDefault-ed

Adds relevant unit tests.

Generates a unique id for tooltip and adds [aria-describedby] to the element
it is called on. Resolves issue #13480

- set up test
- linted the code styles
- passed the tests
- integrated feedback from @cvrebert

primarily adds a data- attribute to the tooltip (and thus, the popover)
to create a self-reference.

#11464 - Fix JS noConflict mode - Refactor all plugins to use an internal reference to the jQuery plugin, because in noConflict mode you can never expect to be defined on the jQuery object

X-Ref: https://github.com/twbs/bootstrap/commit/8c9739d4773c268b114296d90e61b5f4e2932517

- Improve comments.
- Remove `transition.js` script load as `transition.js` unit test doesn't exist.

Also, use Google's CDN per #11369.

This reverts commit edb221a2.
Reverting due to broken JS unit tests.

Conflicts:
	docs/javascript.html