Added a potential background image for landing page: highlighter.
Modal for APA or MLA function working; slight improvements in UI; added JS sources.
reduced the length of the quotes in the index.html.
Merge branch 'master' into Bryan_Thurs

Conflicts:
	app/views/bookmarks/index.html.erb
	app/views/bookmarks/show.html.erb
	app/views/layouts/application.html.erb