Merge pull request #238 from dbrgn/pep8

PEP8
Add Danilo Bargen to authors
Simpler way to pull upstream changes, with optional rebase for advanced git users.
fix #234, this adds formal install instructions to the docs and includes reorganization of the docs
Merge branch 'develop' of github.com:twoscoops/django-admin2 into develop
Index test
Merge branch 'develop' of github.com:twoscoops/django-admin2 into develop
Indexing actions
Merge pull request #239 from audreyr/fix-contributor-instructions

Simpler way to pull upstream changes, with optional rebase for advanced ...
Better example project home. Close #241.
Add django-debug-toolbar to example2
Merge branch 'develop' of github.com:twoscoops/django-admin2 into develop
Merge branch 'better-example' of git://github.com/audreyr/django-admin2 into audreyr-better-example
Add index links for permissions
Added new template filter: model_field_verbose_name
Added model_method_verbose_name util function
Added model_attr_verbose_name template filter.

Renamed the model_field_verbose_name to model_attr_verbose_name in
order to handle both fields and methods.
Show verbose column name in list view (fixes #236)