Evaluate Tor Messenger in the context of Tails

Originally created by @intrigeri on #8577 (Redmine)

• RFC for second alpha: https://lists.torproject.org/pipermail/tor-dev/2015-March/008363.html
• RFC: https://lists.torproject.org/pipermail/tor-dev/2014-December/007981.html
• https://trac.torproject.org/projects/tor/wiki/doc/TorMessenger
• http://instantbird.com/download-all.html

Feature Branch: feature/8577-tor-messenger

Attachments

• tormessenger-apparmor.patch

Parent Task: #8573