Removed the vendor cache from the repo

There's no good reason to cache binary packages in git.
Added the "packages" module

Added the "packages" module to make it easier to add Puppet Classes
to the project without having to create a bunch of additional
repositories. It is meant to be temporary, though, since specific
modules using the Puppet Librarian mechanism is the "right" way to
do it. But during active development of the Class this is a lot
more convenient.
Started supporting Hiera

Created a "config" area for Hiera data files.
Refactored "developer" and "omega" projects

Refactored "developer" and "omega" projects along with the needed
testing classes and hiera data.
Refactored the "jdigger" user

Refactored "jdigger" along with the needed testing classes and
hiera data.
Improved documentation

In addition to new content, extracted the "Installation,"
"Customizing" and "Style Guide" sections from README.