README: Minimal info

README.rst

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 Hunter
 ======
 
-|gitter| |rtfd| |travis| |appveyor| |license|
-
 CMake driven cross-platform package manager for C/C++.
 Linux, Windows, macOS, iOS, Android, Raspberry Pi, etc.
 
 * Documentation: https://docs.hunter.sh
-* Brief overview: https://docs.hunter.sh/en/latest/overview.html (**Must-read!**)
 * Packages: https://docs.hunter.sh/en/latest/packages.html
-* Sources: https://github.com/ruslo/hunter
-* Reporting issues: https://github.com/ruslo/hunter/issues/new
-* Contributing guide: https://docs.hunter.sh/en/latest/contributing.html
-* Contacts: https://docs.hunter.sh/en/latest/contacts.html
-* `Per package testing table <https://github.com/ingenue/hunter/branches/all>`_
-
-.. |gitter| image:: https://badges.gitter.im/ruslo/hunter.svg
-  :target: https://gitter.im/ruslo/hunter
-  :alt: Gitter public chat room
-
-.. |rtfd| image:: https://readthedocs.org/projects/hunter/badge/?version=latest
-  :target: http://hunter.readthedocs.io/en/latest/?badge=latest
-  :alt: Documentation status
-
-.. |travis| image:: https://img.shields.io/travis/ingenue/hunter/pkg.gtest.svg?style=flat-square&label=Linux%20OSX%20Android%20iOS
-  :target: https://travis-ci.org/ingenue/hunter/builds
-  :alt: Travis CI
-
-.. |appveyor| image:: https://img.shields.io/appveyor/ci/ingenue/hunter/pkg.gtest.svg?style=flat-square&label=Windows
-  :target: https://ci.appveyor.com/project/ingenue/hunter/history
-  :alt: AppVeyor CI
-
-.. |license| image:: https://img.shields.io/github/license/ruslo/hunter.svg
-  :target: https://github.com/ruslo/hunter/blob/master/LICENSE
-  :alt: LICENSE
-