12 vacuum cleaner manuals added

12 more vacuum cleaner manuals and parts lists were added recently:

- Black & Decker: 3 vacuum cleaner manuals, 3 vacuum cleaner parts lists
- DeWalt: 1 vacuum cleaner manual
- Fantom: 2 vacuum cleaner manuals
- Hoover: 1 vacuum cleaner manual
- Numatic: 1 vacuum cleaner manual
- Oreck: 1 vacuum cleaner manual