Made the styles for the arrow spans in the home_sidebar lis more specific
fixes ITC-130: UW emergency banner styles added to our theme
fixes ITC-131: changed has_post_thumbnail from a constant to a method call in all templates
refs ITC-70: made an admin menu item which allows for upload of a new homepage image
refs ITC-70: fixed a mistake in the background image css from functions.php
fixes ITC-70: custom homepage images uploaded through the admin display on the homepage in the right spot in the right way
ITC-70: tweaked the messages that guide our users in selecting a homepage image (image guidelines)
Merge branch 'master' of github.com:abztrakt/ITConnect-UW-WP-Child
Fixed homepage sidebar styling issue where ul used mobile styling on desktop