[Telepathy] merge: stream-engine

[Merge Monkey]

Merge to:

  stream-engine

From:

  /home/robot101/public_html/stream-engine-dtmf

Changes:

  Robert McQueen <robert.mcqueen at collabora.co.uk>
    bump farsight dependency to 0.1.17

  Robert McQueen <robert.mcqueen at collabora.co.uk>
    unhook telephony event signal callbacks at dispose time

  Robert McQueen <robert.mcqueen at collabora.co.uk>
    fix broken debug print in stop_telephony_event

  Robert McQueen <robert.mcqueen at collabora.co.uk>
    bump libtelepathy dependency to 0.0.53

  Robert McQueen <robert.mcqueen at collabora.co.uk>
    add support for propogating telephony events from the CM to Farsight

  Robert McQueen <robert.mcqueen at collabora.co.uk>
    add debug messages if event start/stop fails