15 more vacuum manuals added

15 more vacuum cleaner owner's manuals and parts lists were added recently, for the following brands:

- DeWalt: 1 vacuum manual
- Dirt Devil: 1 vacuum manual
- Dyson: 1 vacuum manual
- Hoover: 1 vacuum manual
- Makita: 2 vacuum manuals, 1 vacuum parts list
- Ryobi: 2 vacuum manuals, 2 vacuum parts lists
- Samsung: 3 vacuum manuals
- Sanitaire: 1 vacuum manual