Please remove misleading examples from D's website

[Trass3r]

Mehrdad Wrote:
> Please remove this from the home page:
>      // Automatic or explicit memory management
>      delete cl;
> It is obviously not doing what it implies.
> 
> Similarly, please remove "Allocating Class Instances On The Stack" from 
> the memory.html page:
>      scope c = new C();   // c is allocated on the stack

Feel free to open a pull request.