build_list_filter method added to ModelListView. This method take care of ModelAdmin2.Meta.list_filter option
Added djadmin2.filters module.

This module is handling list filter creation by inspecting the model of
supplied queryset. Contains default mapping for field type filters to
our custom form widgets that are rendering links instead of inputs.
Added list_filter block
Added list_filter attribute to contrib's admin, admin2 definition of Post, Comment model admin.
Better translation docs
Merge remote-tracking branch 'upstream/develop' into list_filter

Conflicts:
	djadmin2/views.py
add docs to our custom widgets and default mapping, just to not formatting
Added RTD link to README
Reference to gettext docs
Add an action_name context variable to model form views
Merge branch 'develop' of github.com:twoscoops/django-admin2 into develop
Added id to list_filters container
Removed unused imports
Added simple test for presence of list_filter container
code style changes
Merge pull request #275 from Eleonore9/for-pull-requests

code style changes
djadmin2.utils.model_options tested to adapt to model._meta changes
Merge branch 'develop' of github.com:twoscoops/django-admin2 into develop
fix indentation issues
minor bugfix