Add Mailing list and Github notification best practice   * Rename the file to best-practices.md   * Addressing reviewers's comments   * Reference Tim's gmail filters in kubernetes-dev   * Address some of the comments   * Fix some typos   * Address reviews   * Add Gubernator note   * Use git.k8s.io instead of github.com
Add Mailing list and Github notification best practice
  * Rename the file to best-practices.md
  * Addressing reviewers's comments
  * Reference Tim's gmail filters in kubernetes-dev
  * Address some of the comments
  * Fix some typos
  * Address reviews
  * Add Gubernator note
  * Use git.k8s.io instead of github.com

kubernetes/community,kubernetes/community,pwittrock/community,kubernetes/community,pwittrock/community