[refs #1303] Updated the images stylesheets
[refs #1303] Updated the sidebar links stylesheets
[refs #1303] Updated the external news stylesheets
[refs #1303] Added the CITES Virtual College stylesheets
[refs #1303] Added the CITES Trade Dashboard block stylesheets
[refs #1303] Added the The InforMEA portal block stylesheets
[refs #1303] Added the Subscribe to email alerts block stylesheets
[refs #1303] Added the Highlights block stylesheets