Add QR code creation
Refactor QR creation
Add qrcode to buildout
Add QR_DIR setting
Fix up urls.py
Fixed generated URL

Turns out that urljoin won't actually join the domain part if it
doesn't have an "http(s)://" in front.
Add qrcode to setup.py since the app won't work without it
Merge pull request #1 from michaelwisely/qrcode

qrcode URL fixes
Update QR file names

There may be several teams with the same slug, so it's necessary to
tack the unique ID on the filename to make sure we're pulling up the
right team for the right competition.

Also added the qr filename to the Team instances to make it easier to
reference the file.
Run var-directory on 'make test'

It makes Travis CI happy
Merge branch 'qrcode' into develop
Ignore qr images