Maemo: Better reporting of SSH timeouts, additional unmount step.

src/plugins/coreplugin/ssh/sshchannel.cpp

src/plugins/coreplugin/ssh/sshconnection.cpp

src/plugins/qt4projectmanager/qt-maemo/maemodeploystep.cpp

src/plugins/qt4projectmanager/qt-maemo/maemodeploystep.h

src/plugins/qt4projectmanager/qt-maemo/maemoruncontrol.cpp

src/plugins/qt4projectmanager/qt-maemo/maemosshrunner.cpp

src/plugins/qt4projectmanager/qt-maemo/maemosshrunner.h