Add: help text to submission form
Merge remote-tracking branch 'origin/atmire-1446-14' into dryad-staging

Conflicts:
	dspace/modules/xmlui/src/main/webapp/themes/Mirage/lib/css/style.css
	dspace/modules/xmlui/src/main/webapp/themes/Mirage/lib/xsl/core/page-structure.xsl