Adds pk_regex attr in PolymorphicParentModelAdmin
Merge pull request #87 from krayevidi/master

Adds pk_regex attr in PolymorphicParentModelAdmin
Mention the improvements of #87 in the changelog and documentation too.
Fixed: adding polymoric model with django-parler did not work
--use-mirrors is deprecated
Merge pull request #88 from jrief/fix-mix-polymorphic-with-parler

django-polymorphic does not work with django-parler
Changelog: mention fix by @jrief
bump version to 0.5.6
Typo in documentation
Merge pull request #92 from davesque/patch-1

Typo in documentation
added permission check for all child types
added django < 1.6 compatibilty for permission codename generation
Merge pull request #93 from Skeptiker88/master

added permission check for all child types
Move the get_permission_codename import to the main code.

cc #93
changelog: mention the backwards incompatibility that #93 introduces.

This at least affects one of own projects.