in old House votes, the legis-num was 'QUORUM 1' and so on
add some more vote category mappings found in historical vote records
In historical House vote XML when the bioguide ID field is not present fall back to matching by name.

Before the 108th Congress, the vote XML never had a bioguide ID.
Starting with the 108th, there are sporadic gaps. This commit
creates a fallback to look-up by name/state/date when no bioguide
ID is present.

So far the 107th Congress maps names to IDs completely. The coverage
may not be as good before that yet. Members with changed names or
changed parties cause some problems.

This also replaces the hard-coded fix for GK Butterfield's "000000"
bioguide ID in several votes, since this is a more generic solution.
See issue #46.