Formatting tweaks; link to URL; link to textile reference

Hi,

I added some basic formatting (paragraph and list margins, bold h1 and h2 headings) for better readability. Also added a link to the textile reference, since it wasn't clear that textile could be used. Finally added a link to the job URL - not sure if that was an oversight or intentionally not shown, feel free to toss it.

Thanks!
Thilo