[empathy] (19 commits) ...Merge branch 'timestamp-648188'

[Guillaume Desmottes <gdesmott src gnome org>]

Summary of changes:

  ddcc4fc... empathy-tp-chat: ensure that we get a TpTextChannel
  29ba2de... use tp_text_channel_get_pending_messages() to get the pendi
  c941068... use TpTextChannel:message-received
  fde2bec... use TpTextChannel:message-sent
  05ab187... empathy-message: add missing getter/setter
  2af2286... factor out empathy_message_new_from_tp_message
  92ff1b9... chat_send_error_cb: don't display the message if it's NULL
  6c45c22... use tp_text_channel_send_message_async()
  e3a5d53... remove empathy_message_new()
  4cda099... empathy-message: remove useless public setters
  1f28f03... factor out handle_incoming_message()
  d12280a... use delivery report instead of Text.SendError
  c97c920... use the TpChannel:chat-state-changed signal
  52d3693... empathy_message_new_from_tp_message: assign priv as soon as
  e3eb2f9... empathy-message: cast timestamps to glong
  2d1ca4e... empathy-time: remove unused functions
  92af7e9... Port all timestamps from time_t to gint64 (#648188)
  eb6ab43... chat_text_view_append_timestamp: use empathy_time_to_string
  bdea54f... Merge branch 'timestamp-648188'