Many changes in MS Sentinel and REST API connectors

What's Changed

• Support batch reading from Log Analytics
• Added streaming reading in MS Sentinel connector
• MsSentinel: Add support for GovCloud and China
• MsSentinel: gracefully handle too many results and throttling
• Allow to submit data as form-data via REST API connector
• REST API connector: Allow to specify arbitrary headers
• It's now possible to install from PyPI

Full Changelog: v0.0.4...v0.0.5