Prime sieve language race

[Bastiaan Veelo]

Dave's Garage is hosting a race to find the fastest among 45 
programming languages. I just watched the [first episode covering 
Pascal, Delphi and Ada](https://youtu.be/tQtFdsEcK_s). There is 
currently [one contribution in D by 
Eagerestwolf](https://github.com/PlummersSoftwareLLC/Primes/tree/drag-race/PrimeD/solution_1). If you can make it faster or want to submit a parallel version, I think they still accept [contributions](https://github.com/PlummersSoftwareLLC/Primes/blob/drag-race/CONTRIBUTING.md).

I don't know when the episode on D will be made, and it might be 
interesting if multiple solutions using different styles are 
available. Anyway, tweaks will be accepted until a final 
comparison in the last episode.

-- Bastiaan.