issue2550855: added search perms for anonymous to the user class. This lets the "show unassigned" search work for anonymous. Patch by Stuart McGraw. Added warning to upgrading.txt and a comment block before the schema change in every template tracker except minimal (doesn't have the search).

#!/usr/bin/env python

# Roundup requires Python 2.5+ as mentioned in doc\installation.txt
VERSION_NEEDED = (2,5)

import sys
if sys.version_info < VERSION_NEEDED:
    print "Content-Type: text/plain\n"
    print "Roundup requires Python %s.%s or newer." % VERSION_NEEDED
    sys.exit(0)