Support AppConfig introduced by Django 1.7.
Added note about INSTALLED_APPS order when admin is used.
Setup django in runtests standalone script for Django 1.7.
Add deconstruct() to field definition.
Fix tests to work with Django 1.7.
Update build configurations.
Fix ProxyModel handling.
Adapt MultilingualManager to use new Lookups from Django 1.7.
Fix Django 1.7 DeprecationWarnings.
Update docs about 1.7 compatibility and bumb the version to 0.8a (close #237).