Announcement text for Pricing and Journals pages.

This also required adjustments to the CSS for special-announcement, which is still inline in both pages.
Dynamic currency display for Pricing and Integrated Journal pages.
Merge remote-tracking branch 'origin/dpc-announcements' into dryad-staging

Conflicts:
	dspace/modules/xmlui/src/main/webapp/themes/Mirage/lib/js/dryad-pages.js