New Helper Class and Updated line-height Mixin

New ".no-border" helper, updated the equation for the line-height mixin
calculations
Updated Some Global Styles & Variables

Minor Styling Changes to Some Buttons
Updated Some Size & Layout Global Styles
Added Automatic Clearing to all the Containers
Added New Color to the Variable Sheet's Palette List
Minor Styling Changes and Updates to Header/Footer

Worked on making everything fit along the vertical baseline, and other
general fixes and changes here and there.
Added Announcements Block on Homepage

...and update homepage copy.
Styled Announcements Block and Refinements All Over

Huge sweeping changes across the board to refine aspects of the homepage
and make it seem less cluttered and easier to use and navigate.