[SDK][Fuel Plugins] SDK lacks instructions on how to use Sphinx to build up plugin-related documentation

[Irina Povolotskaya]

SDK should have the following issues in place to assist developers in using Sphinx for docs:
- Sphinx introduction (how it simplifies the doc preparation process)
- Sample for Sphinx-related config files (what are these)
- Links to the plugin repos that use sphinx so far

[Irina Povolotskaya (ipovolotskaya)]

Published here: https://wiki.openstack.org/wiki/Fuel/Plugins#Documentation_files_structure_and_Sphinx_usage
to be added: samples for specific doc configuration, link to the official Sphinx website+mans

[Bug Checker Bot (esikachev-l)]

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For more detailed information on the contents of each of the listed sections see https://wiki.openstack.org/wiki/Fuel/How_to_contribute#Here_is_how_you_file_a_bug