Amqp-dispatcher

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- Fix handling of heartbeat for pika dispatcher. [Jose Diaz-Gonzalez]

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- Respect heartbeat settings from RABBITMQ_URL environment variable.
[Jose Diaz-Gonzalez]

This also reverts 17829d5, which was caused by incorrect documentation of the haigha library. Instead, we properly default to respecting the heartbeat from the client, and also allow users to override this via the RABBITMQ_URL

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- Respect heartbeat settings from server when using the haigha
dispatcher. [Jose Diaz-Gonzalez]

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- Fix pip install version. [Jose Diaz-Gonzalez]

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- Add a makefile target to run an example runner. [Jose Diaz-Gonzalez]

- Add missing import. [Jose Diaz-Gonzalez]

- Ensure pygments is available. [Jose Diaz-Gonzalez]

- Add more information to the base log format. [Jose Diaz-Gonzalez]

- Use ISO8601 date format
- Add the process id
- Ensure we add the name of the logger
- Wrap time in brackets

- Add documentation for LOGGING_FILE_CONFIG. [Jose Diaz-Gonzalez]

- Allow configuring logging via file config. [Jose Diaz-Gonzalez]

Set the LOGGING_FILE_CONFIG env var to specify a logging config file

- Add caching to travis runs. [Jose Diaz-Gonzalez]

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- Properly handle versions of pika connections where nowait is not
implemented. [Jose Diaz-Gonzalez]

Blocking connections appear to not implement nowait, so we need to sniff out this feature before tacking on a keyword argument.


- Fix pip install instructions. [Jose Diaz-Gonzalez]