Wiki updates - Debian instructions

[Alan DeKok]

> On Mar 27, 2016, at 8:06 PM, Matthew Newton <mcn4 at leicester.ac.uk> wrote:
> 
> Just a heads-up here as I know people often point at the Debian
> building instructions on the wiki.
> 
> I've done a little reorganising. The main "Build" page has been
> getting rather long, so I've separated the Debian build
> instructions off into the (already existing) "Debian" page. So
> Debian and Ubuntu now point there:

  It looks good, thanks.

  I've also pushed some fixes.  It would be good to make a note about the debian files being executable in versions prior to 3.0.12, too.

  Alan DeKok.