unit type for addition to std lib [was Re: D Language 2.0]

[BCS]

Hello SiegeLord,

> BCS Wrote:
> 
>>> Also all of the imperial units that I don't care about, as well as
>>> the more obscure physical units.
>>> 
>> My lib has every SI unit I could fine and all the units I found that
>> I recognised. The current vertion can have a new unit added as a
>> single line of code.
>> 
> SI has 7 base units, your library has only 5 of them. You are missing
> luminosity (candellas) and amounts (moles).
> 

They would be easy to add.

That said All the other type systems (CGS, MKS, imperial, etc.) only have 
those 5 and I find claiming the the last two are base units just a bit silly 
(candelas are defined in terms of power, stradians and an arbitrary curve 
and moles are a count). I left them out in protest but I'll add them if anyone 
cares enough to make much of an issue of it.