Updating for 1.5.1 release.
Updating setup.py version number.
Fixed reversion admin for django 1.4
InlineAdminFormSet has a different `__init__` in Django 1.4

It now takes a `prepopulated_fields` argument, accessible from
`ModelAdmin.get_prepopulated_fields`.
Increment supported Django version for django-1.4 branch
Adding support for multiple db
Merge branch 'master' of git@github.com:etianen/django-reversion.git
Made modifications to multi-db support to be a bit more consistent throughout the API to encourage use of the 'db' through out instead of depending on the model private state. Although there are two exceptions to this when using signals, since we don't control how our API gets called here.

Also added a check for nested revision context managers to make sure consistent use of db is used.
Found a way around peeking into the model state for multi-db support. yay!

Also (removing some pudb cruft). Ooops!
Skip test on admin integration if django.contrib.admin is not activated
Fix 78411523 to work with Python 2.5 which doesn't know about class decorators (PEP 3129)
Merge pull request #108 from cburgmer/master

Skip test on admin integration if django.contrib.admin is not activated
Fixed issue 110 (testCreateInitialRevisions fails for models with initial_data)
Fixing pull request #116
Sending a list of fields to serialize when serializing models.
Added in experimental VersionMetaAdmin class.
Merge branch 'master' into django-1.4
Allow object pks to have slashes in them
Throwing RegistrationError if VersionAdmin is used with a proxy model.

Fixes https://github.com/etianen/django-reversion/issues/102
Quote/unquote admin urls

Use django.contrib.admin.util.quote when putting object pks in admin
urls