Refactoring: changed StopApplicationCommand -> StopApplicationFromFileCommand.
Introduced new StopApplicationCLICommand class as a base class for StopApplicationFromFileCommand, and eventually other application stopping commands.
Refactored ShowStopResultAndSetExitCode of StopApplicationCommand not to depend on an application by file, but only by its name.
Moved and slightly redesigned code from StopApplicationFromFileCommand to StopApplicationCLICommand to be able to use it in more stopping implementations.
Introduced new abstract method GetApplicationToStop in StopApplicationCommand and made sure it's the only requirement for different stop commands to implement. The bulk of the code dealing with prerequisites for this method is now in shared baseclass StopApplicationCommand.
Added new class StopApplicationByNameCommand to Starcounter.CLI, containing the outline for a command that can stop applications by their name.