Cleaned up display of missing flavours

Also cleaned up --debuginfo
Added --debug to set wine debug message levels
Removing compatibility for wwine metadata format v1

Support for upgrading v1 files to a newer format is still present
Renamed --drykill to --running and cleaned up its output
Don't add Cxinstalldir if it isn't used
Deprecated --cxinstalldir and --cxginstalldir

The path to a crossover installation can now be provided directly as an
argument for --wine.

This simplifies a lot of the logic for handling various CX versions, and it
makes it easier to switch to alternate CX versions by supplying --from and --wine
together (ie. one may now use "--from script --wine cx" to use the system default
cx installation, where previously that would have obeyed Cxinstalldir from the
script, potentionally not changing anything).

This bumps the meta format to v4.
Include --wine in the --debuginfo list
Added metadata debugging messages

Also made a cxdir debugging message clearer