Make UTF8 search test work provisionally.
Add failing test reproducing #322 on PB.
Handle multivalued fields a bit inelegantly
Use generated keys and limit the queries by those keys.
Extract search query codecs into separate methods.
Encode the query as UTF8 if given as unicode.
Merge pull request #335 from basho/bugfix/sdc/322-pb-multivalued

Resolve multivalued-fields issue