Make dub part of the standard dmd distribution

[Atila Neves via Digitalmars-d]

>> dub as a build tool sux. no need to discuss that, it simply 
>> sux.
>
> why do you think it sucks ?

dub is a good package manager, but it's not a good build system. 
For small projects that just want to list dependencies and have 
it build, it's sufficient. Any larger project will have needs 
that won't be easily solved by using dub. Which is why I wrote my 
own.

Atila