Fixed various styling issues:
- changed default behavior of word tree to 'one phrase per line'
- added margins to text
- set css3 gradient background
- changed title and 'explore word tree'
- moved credit link (Jason Davies) to footer

Signed-off-by: Alex Olieman <alex@olieman.net>
Merge branch 'master' of https://github.com/mchlbrnd/visual-analytics-2013-boxoffice

Conflicts:
	index.htm
	js/app_treemap.js