Clean code, add comments...

sflphone-client-kde/Account.cpp

sflphone-client-kde/Account.h

sflphone-client-kde/AccountItemWidget.cpp

sflphone-client-kde/AccountItemWidget.h

sflphone-client-kde/AccountList.cpp

sflphone-client-kde/AccountList.h

sflphone-client-kde/AccountWizard.cpp

sflphone-client-kde/AccountWizard.h

sflphone-client-kde/ActionSetAccountFirst.cpp

sflphone-client-kde/ActionSetAccountFirst.h

sflphone-client-kde/Call.cpp

sflphone-client-kde/Call.h

sflphone-client-kde/CallList.cpp

sflphone-client-kde/CallList.h

sflphone-client-kde/ConfigDialog.cpp

sflphone-client-kde/ConfigDialog.h

sflphone-client-kde/Contact.cpp

sflphone-client-kde/Contact.h

sflphone-client-kde/ContactItemWidget.cpp

sflphone-client-kde/ContactItemWidget.h