Update to 0.96

Upstream changes:
2013-05-24  Jarkko Hietaniemi  <jhi@iki.fi>

* Mop-up release for 0.95.  Still is and will be unsupported.

* Release as 0.96.

2013-05-23  Jarkko Hietaniemi  <jhi@iki.fi>

* Address rt.cpan.org #85449:
  "Graph-0.94 tests fail under perl 5.18.0"

* Address rt.cpan.org #82324:
  "Test failures due to hash randomisation in perl 5.17.6"

The two above fixes were the same: the biconnectedness
code was rewritten from scratch.  The new code behaves
differently (but I believe more correctly) on certain
edge cases, in general it will generate more biconnected
components and bridges, for example for "a=b=c" it will
now return the same two biconnected components and bridges
(cut edges), namely "a=b" and "b=c", the "b" of course being
the articulation point (cut vertex).

* Address rt.cpan.org #67213:
  "[PATCH] pod fixes"

* Remove the t/u_bo.t and t/u_bo1.t since they die in 5.18 due
  to some strange failure, looks unrelated to Graph as such,
  probably some fix/change made by newer Perls.

* Release as 0.95.

(wen)