Update for unicode compliance

Review Request #147 — Created Sept. 2, 2007 and submitted — Latest diff uploaded

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Review Board SVN (deprecated)
trunk

Reviewers

Update various models and views for changes in the django unicode branch, according to the instructions at http://code.djangoproject.com/wiki/UnicodeBranch#PortingApplicationsTheQuickChecklist .  There should be
no real functional changes, other than avoiding errors when various things include unicode.
Ran unit tests, and made sure I could still upload and view a diff.