Remove deprecated features

- [ ] bucket and client-level quorum accessors (see `riak.util.deprecatedQuorumAccessors`)
- [ ] `RiakBucket.get_binary`, `RiakBucket.new_binary`, `RiakBucket.new_binary_from_file`
- [ ] `RiakClient.get_client_id` and `RiakClient.set_client_id`
- [ ] `RiakClient.solr`