- cmd/import: add watching of files and directories
- rename smfimporter writing functions
- rename import cmd option OnSetTracks to KeysTracks
- streamline options for smfimport and make them transparent

- unroll to .xlsx file, if .xlsx file is given as a target
- fix sketch tests
- fix import to not print = for default velocity

- fix: normal col after group col is not properly parsed
- fix: allow more than one space between names inside group cols
- fix: format groupcols so that more than once space between names gets replaced by exact one space

- add cutout mode (start and end of a section)
- add new options for cmd line tool to set the solo groups and the cutmode