Avoid sending messages when socket is not connected (lynckia#991)

Fix issues with audio only streams. (lynckia#986)

Added needed folders to release mechanism

fixed MovingAverageStat when value < old_value (lynckia#865)

Release 2

HTTPS Listening option in EC

Fixed compatibility with Chrome, changes to sdp were still being made

for firefox compat, they are not needed

Fixed a bug when closing connections

Updated chrome versions