specify sass as a development dependency
move diagnosticss.css as is to .scss
add rake task to compile .scss to .css
use variables  and  for colors
minimize css
add 'watch' task for easy development
show notice upon hovering broken element
bump TODO
fix typos and duplications in main .scss
image without alt attribute is error
image requiring alt attribute is more important than image without dimensions
document rake watch
address code review
$error and $warning and  should include border width and style
Merge pull request #1 from diagnosticss/scss

SCSS