Changes from 16/10/2014.
Changelog:
2014.10.16:
- Fixed the "RTSPServer" implementation to handle a rare race condition that could cause a
  "ServerMediaSession" object to be deleted while it was being used to implement "DESCRIBE".
  (Thanks to Michel Promonet for reporting this.)
Merge pull request #31 from lshl/master

Changes from 16/10/2014.