22 more vacuum manuals added

22 more vacuum cleaner owner's manuals and parts manuals were added recently:

- Bissell: 8 vacuum manuals, 3 vacuum parts lists
- Dustless Technologies: 2 vacuum manuals
- Hitachi: 1 vacuum manual
- Hoover: 1 vacuum maintenance manual
- Love-Less Ash: 2 vacuum manuals
- Panasonic: 1 vacuum manual
- ProTeam: 2 vacuum manuals, 1 vacuum getting started guide
- Ryobi: 1 vacuum manual

Hitachi vacuum cleaner manuals

Instruction manuals:
- Hitachi CV-AH18 / CV-AH20V / CV-BH18 / CV-SH18 / CV-SH20V Vacuum Cleaner
- Hitachi CV-BH18 / CV-SH18 / CV-SH20V / CV-SY19 / CV-SY21V Vacuum Cleaner
- Hitachi CV-AH18 / CV-SH18 / CV-SH20V Vacuum Cleaner (3-J5589-5C)
- Hitachi CV-S950 / CV-S960 / CV-T940 Vacuum Cleaner
- Hitachi CV-SH18 / CV-SH20V Vacuum Cleaner (3-J5589-4A)
- Hitachi CV-SU20V CV-SU21V / CV-SU22V Vacuum Cleaner
- Hitachi RP 35YB / RP 35YE Dust Extractor

Service manuals:
- Hitachi CV-400P ECO Vacuum Cleaner
- Hitachi CV-940Y VDE Vacuum Cleaner
- Hitachi CV-950BK VDE Vacuum Cleaner