[HTTPS-Everywhere] HTTPS Everywhere 5.0.8 / 2015.8.13 release

[Jacob Hoffman-Andrews]

Latest release is out!

Firefox 5.0.8 / Chrome-2015.8.13
  * Ruleset fixes
  * Restore checkbox icons on Firefox
  * Add a link to the HTTPS Everywhere Atlas

This version still isn't signed. I'm continuing to work with Mozilla on
resolving the blocking issues. Updates are here:
https://github.com/EFForg/https-everywhere/issues/2051