Hamburger menu. Refs #45. Refs #59.
Some responsiveness for the header. Refs #45. Refs #65.
Responsiveness for footer. Refs #45. Refs #65.
Fix nav links to work on any page. Refs #45.
Search box style and more responsiveness for the header. Refs #45. Refs #64. Refs #65.
Merge remote-tracking branch 'origin/master'