Improves the logging situation greatly by allowing all logging messages to be assigned different severities,
highlighting the code that caused them and by now ensuring a qmllint warning will always result in a non-zero exit code.
A later patch will expose more of these options to the user.
Change-Id: Id9b036fe3ba80dd18e9f8cb1b05efa891713d5a8
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>
Maximilian Goldstein