Fix Bug 931902 University banner

Added 1680px breakpoint and image for university banner.
Merge pull request #87 from stephaniehobson/931902UniversityBanner

Fix Bug 931902 University banner
Fix Bug 933000 Gallery Buttons

Made them bigger, opaque, and gave them a drop shadow. Needs to be evaluated by people who know more about design than I do.
Merge pull request #88 from stephaniehobson/933000GalleryButtons

Bug 933000 Gallery Buttons
Fix bug 933481: Show location filter value on listings page.
Fix bug 933366: Update headline to say rabble-rousers. :)