- Load Google library once per page, instead of once per Captcha
- Allows proper functioning of multiple embedded ReCaptchas in a single set of search results

- Error messages now included in pop up.
- Pass form element to data-lightbox-onclose callback.

After exploring new options to make login detection more robust, this is still the best system. Will continue to investigate.

Conflicts:
	themes/bootstrap3/js/cart.js
	themes/bootstrap3/js/lightbox.js

Conflicts:
	themes/bootstrap3/js/cart.js
	themes/bootstrap3/js/lightbox.js
	themes/bootstrap3/js/openurl.js

Conflicts:
	themes/bootstrap3/js/lightbox.js

Tried git merge --squash

Squashed commit of the following:

commit 3945fdb723deacf5050f1b5e33e224c9bb452815
Merge: 63ffa60 9f3fb74a
Author: Chris Hallberg <crhallberg@gmail.com>
Date:   Wed Mar 30 16:56:03 2016 -0400

    Merge remote-tracking branch 'origin/master' into vufind-register

commit 63ffa6043ef91e22a2657f91d8c6a7b68667a380
Author: Chris Hallberg <crhallberg@gmail.com>
Date:   Wed Mar 30 09:42:11 2016 -0400

    Closer adherence to the reveal module model.

commit 0ebb57e9e6a4d1909570ead6e4636a59f7a80e80
Author: Chris Hallberg <crhallberg@gmail.com>
Date:   Tue Mar 29 12:32:37 2016 -0400

    Register and init in VuFind.

Added a fallback for creating CustomEvent on Internet Explorer and switched from direct access of dataset to jQuery for IE support.

Use a more specific selector when checking for flash messages in lightbox so that other markup using the classes doesn't confuse lightbox. Also always use jQuery selectors to find the flash messages to be more tolerant of markup changes (e.g. whitespace, class ordering etc.).