Naz

- Rename `naz.nazcodec.BaseNazCodec` to `naz.codec.BaseCodec`: https://github.com/komuw/naz/pull/191
- Rename `naz.Client.codec_class` to `naz.Client.codec`: https://github.com/komuw/naz/pull/191
- Add ability for `naz.log.SimpleLogger` to render logs as a python dictionary: https://github.com/komuw/naz/pull/191
- BugFix, `data_coding` should not be applied to all fields that are of type C-octet string: https://github.com/komuw/naz/pull/190
- Have the naz messsage protocol only use utf8 for encoding/decoding: https://github.com/komuw/naz/pull/190

- Fix a bug that prevented `enquire_link` and `deliver_sm` from been sent: https://github.com/komuw/naz/pull/179
- Enforce `naz` message protocol in code: https://github.com/komuw/naz/pull/179
- make `naz.Client.logger` to be a python `logging.Handler`: https://github.com/komuw/naz/pull/181
- carry out fuzzy testing: https://github.com/komuw/naz/pull/178
- re-run benchmarks: https://github.com/komuw/naz/pull/182

- make `naz.SimpleCorrelater.delete_after_ttl()` private: https://github.com/komuw/naz/pull/172
- rename `naz.broker.BaseOutboundQueue` to `naz.broker.BaseBroker`: https://github.com/komuw/naz/pull/174
this is the more idiomatic name for what it is.
- re-run benchmarks after renmaing Queue to Broker: https://github.com/komuw/naz/pull/176

- fix infinite loop bug, which could occur while re-establishing connection & re-binding to SMSC: https://github.com/komuw/naz/pull/171

- add ability to start `naz` even when SMSC is down: https://github.com/komuw/naz/pull/168
this may be important when you want to deploy `naz` when the mno/SMSC is down and you want `naz` to automatically connect when the SMSC comes back online.

- Use python 3.7 since it has better `async/await` support: https://github.com/komuw/naz/pull/166