Remove deprecated features

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