Added a link to resource.openra.net

as described in #108 it was not directly linked from the main website. The bug reporting was redundant to the help section and the tell your friends was redundant to the get in touch via social networks.
`appreciated. See` &rarr; `appreciated.<br />See` please.  This is a new sentence that otherwise flows over two lines, which is something that I was careful to avoid in the original page.