Replace Shadowbox with GLightbox, drop jQuery from public site

Vendors GLightbox 3.3.1 (MIT, dependency-free) as static files in
public/javascripts and public/stylesheets, replacing the Shadowbox
2009 vendor tree and its jQuery adapter. Public site no longer loads
jQuery at all.

- app/views/layouts/application.html.erb: swap Shadowbox script/style
  includes and the public_bundle (jQuery) include for GLightbox's
  CSS/JS
- app/views/content/_headline_image.html.erb: headline image is now
  itself a GLightbox trigger; additional images are direct
  a.glightbox links sharing a per-page data-gallery group, replacing
  the hidden shadowbox_images div and its click-forwarding trigger
- public/javascripts/public.js: replace Shadowbox.init/setup and the
  click-forwarding handler with a single GLightbox() init call;
  remove the unused image_handler object
- Remove public/javascripts/shadowbox/ (including vendored Sizzle,
  swfobject, and unused video/Flash players) and
  public/stylesheets/shadowbox.css
- Remove app/assets/javascripts/public_bundle.js (jquery require)

1 files changed, 0 insertions, 11 deletions

diff --git a/public/javascripts/shadowbox/adapters/README b/public/javascripts/shadowbox/adapters/README
deleted file mode 100644
index 5083961..0000000
--- a/public/javascripts/shadowbox/adapters/README
+++ /dev/null
@@ -1,11 +0,0 @@
-A Shadowbox "adapter" is a small helper file that makes it easy to use
-Shadowbox with a given JavaScript framework. Since most JavaScript frameworks
-tend to contain a basic set of very similar functions (for retrieving style
-information on elements or handling events, for example) it is not necessary to
-tie Shadowbox to a particular framework. Instead, the adapter can use the
-underlying framework that is already loaded on the page to reuse some of the
-code.
-
-If you do not see an adapter for your favorite framework in this directory, feel
-free to create your own and implement the same interface as the others. It may
-then be used the same as you would use any other.