19 more vacuum manuals added

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

- Black & Decker: 4 vacuum manuals
- Central Machinery: 1 vacuum manual
- Clarke: 1 vacuum parts list
- Eureka: 4 vacuum manuals
- Infinuvo: 1 vacuum manual
- Sanitaire: 1 vacuum manual
- Shark: 4 vacuum manuals, 3 vacuum quick start guides

Central Machinery vacuum cleaner manuals

Owner's manuals:
- Central Machinery 61162 2-1/2 Gallon Wet/Dry Vacuum/Blower
- Central Machinery 61317 5 Gallon Wet/Dry Vacuum/Blower
- Central Machinery 94282 5 Gallon Wet/Dry Vacuum/Blower