added Sass bootstrap files

added sass files from jlong/sass-twitter-bootstrap and reconfigured
css/javascript files for new structure
updated override with sass

rewrote override styles with sass variables to make editing easier
added flash partial

added flash partial and some dummy errors to test settings
temp patch for col-offset

submitted patch for jlong/sass-twitter-bootstrap.
disabled demo flash messages
fixed about textarea

added resize: vertical to stop textarea from breaking page layout