This is a rewrite of much of the code related to voting. Some of the
improvements include:
- Detangling the whole process of creating and processing votes
- Creating an actual Vote class to use instead of dealing with
inconsistent ad-hoc voting data everywhere
- More consistency with naming and other similar things like vote
directions (previously had True/False/None in some places,
1/-1/0 in others, etc.)
- More flexible methods in determining and applying the effects of votes
- Improvement of modhash generation/validation
- Removing various obsolete/unnecessary code
0c637151b5