Supervisor-win

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- Merge supervisor unix changes from 4.3.0.dev0 (master).
- Upgrading from pywin32 to python3 (issues/43).
- Fix installation of services (issues/42).
- https://github.com/alexsilva/supervisor/issues?q=is%3Aissue+is%3Aclosed

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- Merge supervisor unix changes from 4.2.2.dev0 (master).
- Improvements in the execution of the supervisor as a windows service.
- Support for sending signals for windows application.
- Improvements to service logs.

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- Merge supervisor unix changes from 4.2.2.dev0 (master).
- Improvements in the installation of the windows service.
- Corrections in writing to the windows service log.
- Bug fix when the 'directory' option of a process has quotes.
- Adding xmlrpc_timeout configuration to supervisorctl.

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- Merge supervisor unix changes from 4.2.0.dev0 (master)
- Support for web servers that supports shared socket (fastcgi).
- Support for sending Windows signals. (signal CTRL_C_EVENT|CTRL_BREAK_EVENT)
- Possibility to configure a custom service name (options: '--service-name' or '--service-display-name').

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- Merge supervisor unix changes from 4.2.0.dev0 (master)
- Stop process group with task taskkill
- Fixing service data output issues

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- Merge supervisor unix changes from 4.2.0.dev0 (master)
- Fixed data output via eventlisterner