Handle error messages - Handle refused calls

src/Makefile

src/audiodrivers.h

src/audiodriversalsa.cpp

src/audiodriversalsa.h

src/audiodriversoss.cpp

src/audiodriversoss.h

src/audiortp.cpp

src/configurationpanel.ui

src/configurationpanelui.cpp

src/configurationpanelui.h

src/error.cpp

src/error.h

src/manager.cpp

src/manager.h

src/phonebookui.cpp

src/phonebookui.h

src/qtGUImainwindow.cpp

src/sip.cpp

src/sip.h

src/tonegenerator.cpp