Tagged by CORD Jenkins version-tag job: 10, for Gerrit patchset: 33428
Added a HOWTO page release based source edits.

   * Exclude all variants of python virtual env from traversal.
   * Exclude __pycache__ from document traversal.

   * Create a top level index link/page for release howto(s).

   * Document version based script edits required at time of release.
   * This URL will be used by repo:ci-management/vars/installVoltctl
     to display self-documenting help.

   * Added placeholders and resources for documenting future topics.

Chaser edits:
   o Bump VERSION string.
   o 'stern' URL in unrelated troublteshooting.rst doc failed link check:
      + github repo no longer exists.
      + add replacement github/stern/stern

Change-Id: I2f0f15eb5ba7bd6817806296928964df5259b21a
12 files changed