pkg: drop python 2.5 compatibility (closes #2711624)
2.5 is not common anymore. Dropping compatibility will help moving to a code
base compatible with Python 3.3
Add some entities
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As manager, you can access to entity creation forms by using the `site management`_ page.
.. _`site management`: manage
As regular user, the index page or the action box may propose some links to create entities according to the context.