[GRASS-git] [OSGeo/grass-addons] e69b3d: CONTRIBUTING.md: added for Addons

[Markus Neteler]

  Branch: refs/heads/add_CONTRIBUTING_md
  Home:   https://github.com/OSGeo/grass-addons
  Commit: e69b3dc53e68cc55a86a62a8472f1aeb837a26ec
      https://github.com/OSGeo/grass-addons/commit/e69b3dc53e68cc55a86a62a8472f1aeb837a26ec
  Author: Markus <neteler at gmail.com>
  Date:   2020-05-27 (Wed, 27 May 2020)

  Changed paths:
    A CONTRIBUTING.md

  Log Message:
  -----------
  CONTRIBUTING.md: added for Addons

File derived from https://github.com/OSGeo/grass/blob/master/CONTRIBUTING.md

Fixes #173