Updated version information to 1.0.0.alpha (Ninken).

Updated version information to 1.0.0.alpha (Ninken).

This is mostly to bring the `type` field of __version__ into agreement
with Python's alpha/beta/candidate/final.  The bump to major version 1
is intended to reflect the major recoding of the Hooke internals that
I've been carrying out.

The name change (Kenzo -> Ninken) follows the list of Japanese
emperors
  http://en.wikipedia.org/wiki/List_of_Emperors_of_Japan
This matches Seinei -> Kenzo progression, so I'm pretty sure this is
where the current naming scheme comes from.