It would be useful to have a tool to manage the contents of the
removals file used by queue-viewer.

Possible functionality (mostly a braindump):
- given a bug number, check it is filed against release.d.o
- if it isn't usertagged, offer to do so (rm + suite)
- if it is usertagged but not rm, error
- if the suite tag is wrong, error or offer to fix?
- add the bug to the removals file if it's not already present
- tag the bug pending
- if necessary, retitle the bug based on the file (possibly asking for
whether it's RoM / RoQA etc first)

Regards,

Adam