Improved sws indent and stylus syntax highlight

[jpallari]

I got annoyed how 'sws-indent-line always added extra indentation each time I did 'newline-and-indent. Here's my attempt at fixing it while still keeping the old code as compatible as possible.

I also added single quote syntax highlight to stylus mode.

[jpallari]

By the way, 'beginning-of-line-text in 'sws-point-to-bot doesn't always work the way you'd expect. For example, the character "-" isn't interpreted as text, so 'beginning-of-line-text skips past that character if the line text begins with it. I'll see if I can fix it.

[brianc]

thank you!