11 more vacuum cleaner manuals added

11 more vacuum manuals were added recently, for the following brands:

- Bissell: 1 vacuum cleaner manual
- Cleva: 1 vacuum cleaner manual
- Dyson: 2 vacuum cleaner manuals
- Eureka: 4 vacuum cleaner manuals, 1 vacuum cleaner parts list
- Hoover: 1 vacuum cleaner manual
- Miele: 1 vacuum cleaner quick reference guide