Add a class/scope method ::destroy

This allows you to destroy objects without reading them first, and also
without respect to versioning.

Implementation is a bit kludgy but the best I could think of without a
big rewrite of the persistence internals.
Bump version
Bump version

For no reason other than bundler is being weird
Merge branch 'master' of github.com:brewster/elastictastic

* 'master' of github.com:brewster/elastictastic:
  Add missing #to_s call
  Enable hosts in a subpath
  Bump version
  Use inspect method
  Show entries on Scope#inspect

Conflicts:
	Gemfile.lock
	lib/elastictastic/version.rb