refine button utility classes
update style guide with more buttons
update style guide color
move date picker lib styles into hours CSS
remove unnecessary homepage news styles
add tablet--portrait-only breakpoint
hide loc images at tablet--portrait-only bp
fix some homepage news post heights
allow full-width buttons to have right/left margins
remove some unused menu and search styles
add Sass comment
hours and get-it styles incorrectly registered
hide inlinesvg when not supported
box-sizing for pseudo elements
overflow: hidden for SVG
set overflow and position rules for transitions
fix alerts SVG widths/heights

old Webkit bug relating to max-height
define width & height for MITlib logo SVG

fixes old Webkit SVG sizing bug