Fixes from notes

[bmispelon]

As promised, here's the list of things changed by this pull request (there's roughly one commit per item to make reviewing easier):

• some links to python docs point to version 2
• in install_python, the python3 version should be 3.4.1?
• in django_models, default=timezone.now() should be timezone.now
• __unicode__ should be __str__ (Python 3)
• in deploy, the .gitignore file should ignore __pycache__ (python 3) instead of *.pyc (python 2)
• Links to Django docs should point to the version used (1.6)
• in django_forms, there's no need for the {% load future %}
• in django_forms, we could use shortcuts.redirect() instead of HttpResponseRedirect
• in domain, the google search link can be simplified (and moved to google.com instead of google.pl probably)

[keimlink]

All changes are looking good!