updates to widget dryad-citation; widget data-frame height auto-adjust; lightbox close-button
added messages.xml file in attempt to get i18n to occur in dryad-widges sitemap
tweaks to widget stylesheets
overwrote localization slugs with en text, as a temporary workaround for real localization of ddw sitemap localization
Merge branch 'trello-49' into dryad-dev