Polishing D - suggestions and comments

[Christopher Wright]

Dan wrote:
> - Committed algorithms would need to solve some problem domain, and would not be trivially implemented with one-liners or other items in the library.

There's some value in having a standard way of solving something, even 
trivial, if the problem appears often enough. Things like some array 
operations, indexof for instance. And partitioning an array: a foreach 
loop is the best you'll get, and efficient, but Tango still has a 
partition function.

The criteria should be:
Does it save people time?
Does it make their code clearer?
Does it reduce the number of bugs in client code?

Maybe a few more things.