Implemented breakpoints

Set breakpoints at 820px and 480px.  Tried to match the original design
intent while maximizing usage of screen space.  Invitation section goes
fluid at medium sizes so I used jquery.widowfix plugin to avoid
widowing the word "own".
RSVP Functionality

Added js handler for RSVP buttons at the bottom.  Added an RSVP link at
the top for mobile.  Switched invitation header to an h2 since the
title is an h1.  Refactored some SCSS.
FF Font Fix

Resolved issue with CourtneyDorkling not loading in Firefox
Cross browser fixes

Styled the chromeframe prompt.  Fixed title spacing issue in IE6&7.
Fixed z-indexing issue in FF Windows.
Browser support documentation
SCSS Cleanup

Refactored the SCSS.  Fixed webkit background rendering bug.