[Telepathy] merge: telepathy-spec

[Merge Monkey]

Merge to:

  telepathy-spec

From:

  /home/robot101/public_html/telepathy-spec-dtmf

Changes:

  robert.mcqueen at collabora.co.uk
    replace innards of DTMF API with continuous Start/Stop tone methods

  robert.mcqueen at collabora.co.uk
    clarify error cases on the DTMF interface

  robert.mcqueen at collabora.co.uk
    add Start/StopTelephonyEvent signals on MediaStreamHandler interface

  robert.mcqueen at collabora.co.uk
    add full-stops to DTMF argument descriptions