Added timeout handling for command line modules.
Merge branch 'cli-timeout' of https://github.com/saschazelzer/CTK into 376-handle-timeout-retrieving-xml

Conflicts:
	Libs/CommandLineModules/Backend/LocalProcess/ctkCmdLineModuleBackendLocalProcess.cpp
	Libs/CommandLineModules/Core/ctkCmdLineModuleManager.cpp
	Libs/CommandLineModules/Core/ctkCmdLineModuleManager.h
	Libs/CommandLineModules/Core/ctkCmdLineModuleTimeoutException.cpp
	Libs/CommandLineModules/Core/ctkCmdLineModuleTimeoutException.h
Enable timeout to be specified via MainWindow
Put messageBoxModuleRegistration back in