Amqpstorm

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- Fixed Connection close taking longer than intended when using SSL [75] - Thanks troglas.
- Fixed an issue with closing Channels taking too long after the server initiated it.

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- Added support for passing your own ssl context [71] - Thanks troglas.
- Improved logging verbosity on connection failures [72] - Thanks troglas.
- Fixed occasional error message when closing a SSL connection [68] - Thanks troglas.

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- Set default TCP Timeout to 10s on UriConnection to match Connection [67] - Thanks josemonteiro.
- Internal RPC Timeout for Opening and Closing Connections are now set to a fixed 30s [67] - Thanks josemonteiro.

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- Fixed minor issue with the last channel id not being available.

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- Re-use closed channel ids [55] - Thanks mikemrm.
- Changed Poller Timeout to be a constant.
- Improved Connection Close performance.
- Channels is now a publicly available variable in Connections.

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- Upgraded pamqp to v2.0.0.
- Python 3 keys will now always be of type str.
- For more information see https://pamqp.readthedocs.io/en/latest/history.html
- Properly wait until the inbound queue is empty when break_on_empty is set [63] - Thanks TomGudman.
- Fixed issue with Management queue/exchange declare when the passive flag was set to True.