New Module: HTML5 Images & Gallery

HEADS UP: SECURITY MODE HAS TO BE OFF FOR THIS ONE TO WORK!

Does 3 things: 1. Wraps images sent to the editor in a <figure>
element. 2. Wraps image captions in <figcaption> accordingly. 3.
Replaces the HTML output of the native gallery shortcode with HTML5ed
markup: <section><figure><a><img><figcaption>.

Classes stay the same, but some CSS tweaking weill have to be done.
Also columns are no longer applied on galleries once this module is
activated. The columns select in the media uploader has no effect on
the gallery output.

The module looks for custom fields from the Photographer Credit Fields
for Media module. If present, they are included with single images and
as a footer for galleries. Both can be hidden via CSS if necessary.