Backend-ai

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**FIX**

- Fix the wrong version range of an optional depedency package "datadog"

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**IMPROVEMENTS**

- Improve packaging so that setup.py has the source list of dependencies
whereas requirements.txt has additional/local versions from exotic
sources.

- Support exception/event logging with Sentry.

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**FIX**

- Revert authorization in terminal pty streaming due to regression.

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**FIX**

- Missing sorna.cli module in distribution.

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**NEW**

- Add console scripts "lcc" and "lpython" which are aliases
of "python -m sorna.cli run c" and "python -m sorna.cli run python".

- Add explicit "--build" and "--exec" option for batch-mode
customization.

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**FIX**

- Fix support for interactive inputs in the batch mode.