[Checkins] [zopefoundation/persistent] 8f7440: Add badges: Travis, RTD, PyPI, PyVersions.

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/zopefoundation/persistent
  Commit: 8f7440f40c7422cd0b955f0ce3cd75bcf8891112
      https://github.com/zopefoundation/persistent/commit/8f7440f40c7422cd0b955f0ce3cd75bcf8891112
  Author: Tres Seaver <tseaver at palladion.com>
  Date:   2016-03-25 (Fri, 25 Mar 2016)

  Changed paths:
    M README.rst

  Log Message:
  -----------
  Add badges:  Travis, RTD, PyPI, PyVersions.

[ci skip]