compunit classes

[Richard Hainsworth]

Hi,

I'm sending an email rather than IRC to catch more feedback.
There are several CompUnit::Repository classes, viz.

AbsolutePath

FileSystem

Installable

Installation

Locally

NQP

Perl5

Spec

Unknown


Would it be possible for someone to provide a line or two as to the 
purpose/use/use-case for each class. I'm trying to document these classes.

Regards,

Richard