Pulling in Sarah's and my changes as of 8/2

[gdostal]

Changes include

• a condensed header
• the beginnings of a mobile menu
• the start of a news slider
• An events widget
• square buttons
• a now trending section
• a ask a librarian button fixed at the bottom of the page

[gdostal]

Everything's been successfully merged. Feel free to pull this into your repository now.