fixed mispelling of transferSucceeded, added check_error function

The software itself is now available from:

  http://www.codepad.de/en/download/firefox-add-ons/telify.html

Conflicts:
	daemon/src/sip/sipvoiplink.cpp

Debian has automated systems that look for common typos in binaries

Use anonymous namespaces to make names translation unit local, rather than "static"

This avoids casts and is cleaner.

Conflicts:
	daemon/src/sip/sipaccount.h

No need to represent DTMF with an enum

Status bar update is not done in a separate thread anymore, so the mutex
should not have been there.

This reverts commit a4256fcb, reversing
changes made to aa2dd717.

Conflicts:
	daemon/src/managerimpl.cpp

Signed-off-by: Emmanuel Milou <emmanuel.milou@savoirfairelinux.com>

Assumes that this is the case if a call is ringing when it is
terminated.

Fixed whitespace, removed unused methods, corrected documentation.

Resolved Conflicts:
	daemon/src/managerimpl.cpp

Whenever we hangup or our peer hangs up a call, an entry is added to the history
(in memory). When the daemon exits, it will save the history
automatically.