DlangIDE update

[Vadim Lopatin via Digitalmars-d-announce]

On Wednesday, 9 December 2015 at 09:18:37 UTC, default0 wrote:
>>> I still haven't written much D code and my time is somewhat 
>>> limited, but if there are simple tasks you need to get done, 
>>> I would be glad to offer help!
>> It would be great.
>>
> Will be looking through GitHub and try to set DlangUI etc. up 
> locally, too and see what I can do :-)

Added development environment setup instructions (VisualD, 
Mono-D) to README.