Riak 2 Feature: Yokozuna

![It's Happening](http://i.imgur.com/VSs5PQs.gif)

Refer to https://github.com/basho/yokozuna/wiki/Client-Test-Checklist

# Schema Management / DDL

- [x] Create schema
- [x] Read schema
- [x] Create index
- [x] List indexes
- [x] Read index
- [x] Associate indexes with buckets

# Queries / DML

- [x] Integration test that stuff actually gets indexed
- [x] Single term queries
- [x] Multiple term queries
- [x] Boolean logic queries
- [x] Range queries
- [x] Phrase queries
- [x] Wildcard queries
- [x] Regexp queries
- [x] Parameters: start/offset, rows/limit, fl, etc: https://github.com/basho/riak_pb/blob/master/src/riak_search.proto
- [ ] Integration test that it's all UTF-8