Pan-iot-security-python

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- Add -O option, an optimised version of -j for the get all methods,
which does not place all the results in memory.

- Add policies_all() method.

- Fix missing profile(), policy() in method attributes documentation.

- Unit test enhancements.

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- Add support for new API requests:

- Get device profiles
- Get policy rule recommendations

- Print stack trace entries in addition to exception information
depending on debug:

- debug 0: exception information
- debug 1: stack trace limit=-1
- debug > 1: stack trace limit=None

- /tag/list API request uses offset and pagelength.

- iotapy.py: Fix for missing await.

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- Change generator methods to return a tuple. NOTE: not backward
compatible. See documentation for the 3 ``*_all()`` methods.

- Documentation fixes and improvements.

- Unit test fixes and improvements.

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- Initial release.