Added C::P::S::Meta.pm

This is the start for  issue #18.  I have implemented:

* Date the blog was (re)built. (build_date)
* Time the blog was (re)built. (build_time)
* The version of chronicle. (chronicle_version)

I have left the hostname/username out for now as I wouldl ike to see your advice on doing this seculey.