Line managing works

src/gui/official/Call.cpp

src/gui/official/JPushButton.hpp

src/gui/official/ObjectFactory.hpp

src/gui/official/PhoneLine.cpp

src/gui/official/PhoneLine.hpp

src/gui/official/PhoneLineButton.cpp

src/gui/official/PhoneLineButton.hpp

src/gui/official/PhoneLineLocker.cpp

src/gui/official/PhoneLineLocker.hpp

src/gui/official/PhoneLineManager.cpp

src/gui/official/PhoneLineManager.hpp

src/gui/official/Request.cpp

src/gui/official/Request.hpp

src/gui/official/RequesterImpl.cpp

src/gui/official/SFLPhoneApp.cpp

src/gui/official/SFLPhoneApp.hpp

src/gui/official/SFLPhoneWindow.cpp

src/gui/official/SFLPhoneWindow.hpp

src/gui/official/Session.cpp

src/gui/official/Session.hpp