Merge dev into master

[nitmir]

Bugs fixes

• Keep LoginTicket list upon fail authentication
  (It prevent the next login attemps to fail because of bad LT)

whats new

• Add sphinx docs + autodoc
• Add the possibility to run tests with "setup.py test"
• Include docs, Makefile, coverage config and tests config to source package
• Add serviceValidate ProxyTicket tests
• Add python 3.5 tox/travis tests

Cleaning

• Compact federated mode migration
• Reformat default_settings.py for documentation using sphinx autodoc
• Factorize some code (from views.py to Ticket models class methods)
• Update urlpattern for django 1.10
• Drop dependancies django-picklefield and django-bootstrap3

Misc

• Use https://badges.genua.fr for badges