17 more vacuum cleaner manuals added

17 more vacuum cleaner manuals have been added to the site recently, for the following brands:

- Kenmore: 2 vacuum owner's manuals, 2 vacuum service manuals, 1 vacuum parts list
- Nilfisk: 2 vacuum owner's manuals, 1 vacuum service manual
- Russell Hobbs: 8 vacuum owner's manuals
- Sanitaire: 1 vacuum owner's manual