Fixes issue #7 Ubuntu still present on homepage
Fixes issue #6 Adding a contact leads to a 404
fixes issue #3 support finding out if People are Debian developers

There was a bug that came from build_people_db where the \n wasn't being
removed and this resulted in no one being marked as a debian dev. This has
been fixed. Here is a shell transcript showing that:
>>> from uploads.models import People
>>> all_people = People.objects.all()
>>> debian_emails = set()
>>> dat_people = set()
>>> for p in all_people:
...     dat_people.add(p.email)
...
>>> for p in open('debian-emails'):
...     debian_emails.add(p.strip())
...
>>> deb_devs = dat_people.intersection(debian_emails)
>>> len(deb_devs)
619
>>> is_dd = all_people[63]
>>> is_dd.name
u'Mark W. Eichin'
>>> is_dd.email
u'eichin@thok.org'
>>> is_dd.email in deb_devs
>>> all_people[213].name
u'Christian Hammers'
>>> all_people[213].email
u'ch@xeniac.westend.com'
>>> all_people[213].email in deb_devs
False