Use private doppelgaenger version module for bootstrapping.

This pull-request creates a private copy of version/version::vpp/version::regex
for use in boostrapping and modifies the bundled CPAN::Meta and
CPAN::Meta::Requirements to fall back to it if needed.

Passes tests on a stock Perl 5.8.1 on Linux.

It should get a lot of peer review and testing before merging.

Addresses #103.