votingapi 6.x-2.2

#480036: cannot get vote values through nodereference relationship by j_ten_man - allow votingapi relationships to be chained off of other relationships (like node references)
#496454: warning: unknown column vote_source in table votingapi_cache when used as criteria in votingapi_select_results PHPDoc incorrectly listed 'uid' and 'vote_source' as valid filtering criteria on cached aggregate results.

Added an 'Other' option for Relationships filters, to allow nonstandard tags, filters, and so on to be used in VotingAPI relationships with minimal hassle.