Updates to teaser template

Moved label in HTML markup so it's not floating on thumbnail. Added Thumbnail clipping. Restyled label.
Merge branch '4.0_template' of github.com:unl/UNL_MediaHub into teaser-updates-corrected

Conflicts:
	www/templates/html/Media/teaser.tpl.php
	www/templates/html/css/media.css
Merge pull request #152 from spennythug/teaser-updates-corrected

Teaser styling and markup updates