Descent 0.5 released

[Ary Borenszweig]

D 2.x is supported, but the semantic analysis is for 1.x. In fact, I 
just tried it, and if you write "invariant(int) x;" you get a lot of 
syntax errors, so D 2.x is not supported (tiny bug, I've just fixed it :-()

Extrawurst wrote:
> looks like an awesome feature list! respect!
> i have just one question, is the D2.x language supported aswell with all 
> the nifty features?