version 1.20.0 "SRTP, Conference URL & TLS-DSK Improvements" (2015-08-29)
- Feature [#82]: Parse HTML from Lync conference URL (Stefan Becker)
- Feature [#69]: SRTP Support (Jakub Adam)
- requires libpurple >= 3.0.0
- Fixed [#285]: Office365 rejects RC4 in TLS-DSK (Stefan Becker)
- added support for AES-128/256-CBC
