New tool manuals added

More tool manuals for the following brands were added to the site recently:

- Check-Line: 2 gauge manuals
- DeWalt: 1 nailer manual
- Duff-Norton: 2 screw actuator manuals
- Makita: 1 drill manual, 1 drill parts list
- Ryobi: 1 caulk gun manual, 2 saw manuals