New tool manuals added

Many tool manuals have been added to the site recently, for the following brands:

- Craftsman: 2 saw manuals, 1 sharpener manual
- Delta: 2 air compressor parts lists, 3 saw manuals
- DeWalt: 3 drill manuals, 1 joiner manual
- Porter-Cable: 6 air compressor manuals, 3 nailer manuals, 1 router manual, 2 saw manuals, 1 saw parts list
- Ridgid: 1 planer manual