Descent 0.5.5 released

[Saaa]

> For this release Robert Fraser made an excelent addition: when compiling
> programs using an external tool such as dsss, rebuild, dmd, gdc, ldc, gdmd 
> or bud, there are now links to the files in the console output for 
> warnings and errors. I think this one was pretty requested. So say thanks 
> to him! :-)
>
> (here's a screenshot in case no one understood my poor English: 
> http://downloads.dsource.org/projects/descent/problems.jpg :-P)

<3