Always load settings when initializing BugDir from storage.

Always load settings when initializing BugDir from storage.

Avoids problems like:

$ be html
Traceback (most recent call last):
  File "be", line 21, in <module>
    sys.exit(libbe.ui.command_line.main())
  File ".../libbe/ui/command_line.py", line 327, in main
    ret = dispatch(ui, command, args)
  File ".../libbe/ui/command_line.py", line 267, in dispatch
    ret = ui.run(command, options, args)
  File ".../libbe/command/base.py", line 504, in run
    return command.run(options, args)
  File ".../libbe/command/base.py", line 233, in run
    self.status = self._run(**params)
  File ".../libbe/command/html.py", line 111, in _run
    html_gen.run(params['output'])
  File ".../libbe/command/html.py", line 154, in run
    bugs.sort()
  File ".../libbe/bug.py", line 261, in __cmp__
    return cmp_full(self, other)
  File ".../libbe/bug.py", line 818, in __call__
    val = comparison(bug_1, bug_2)
  File ".../libbe/bug.py", line 750, in cmp_status
    return cmp(status_index[bug_1.status], status_index[bug_2.status])
  File ".../libbe/storage/util/properties.py", line 223,
in _fget
    raise ValueCheckError(name, value, value_allowed_fn)
libbe.storage.util.properties.ValueCheckError: open-feature not allowed by <function <lambda> at 0x84b610c> for status