add support for scss

This adds support for reloading the CSS when an .scss or .sass file is saved.
There is a delay before reloading the CSS, to allow the CSS to compile.

The assumption is that Compass, or another compiler is running and will generate the necessary CSS file.

Currently the delay is at 1.5 seconds.
This works for me, but it may need to be increased for larger projects / slower computers; it could be decreased for faster computers.

    python time.sleep(1.5)