Always create a library instance
Always create a library instance

Tests started failing because the storybase_i18n template tag library
doesn't always contain a ``register`` variable instantiated with
``register = Library()``. This should always happen, even if the rest of
the template tag implementation doesn't get executed (because it's a
backport that's only needed for Django 1.3).

denverfoundation/storybase,denverfoundation/storybase,denverfoundation/storybase,denverfoundation/storybase