Add link to Pagedown on the project home page.

[Google Code Exporter]

It would be nice to link to the pagedown project on this project's home page, 
for those looking for the client-side compliment to MarkdownSharp. :)

Original issue reported on code.google.com by [e-mail] on 2 Aug 2012 at 7:47

[Google Code Exporter]

Shouldn't be listed as a defect...

Original comment by [e-mail] on 2 Aug 2012 at 7:48