Fix wrongly quoted host.name variable.
Add more changes with incorrectly quoted variables

During the preparation for Django-1.5 compatibility the url reverses
needed to be quoted, but in many cases the variables being passed as
args were also quoted. Most have since been reverted anyway, but this
fixes the remaining ones.
Merge pull request #51 from rowanthorpe/hosts-view-hostname-bug

Fix wrongly quoted variables in several files.