Expanded blacklist
Misc improvements to scoring

Better scoring of attribute values that only apply bias if they only
occur once. Fixed a bug with reporting of descendantBias, previously
only the final bias was displayed. Reweighted p descendant bias from 30
to 100 to try and improve accuracy. Added a comment about limiting how
anchor bias is applied.
Minor stylistic change to deserializeFeed

Use short-circuited union instead of if not if not.
Minor stylistic change to upgradeDatabase

Use this.transaction instead of event.currentTarget.transaction.
Minor cleanup of resolveElements

Change name of name to attribute map because it is a constant.
Abbreviated some other code.
Minor reorganization to pollFeeds helper funcs

Largely just moved around and re-ordered some of the inner funcs. Added
entry dedup prior to update.