32 more chain saw manuals added

32 more chain saw manuals and parts lists have been added recently, for the following brands:

- Black & Decker: 1 chain saw manual, 1 chain saw parts list
- Husqvarna: 1 chain saw manual, 15 chain saw parts lists
- Stanley: 2 chain saw manuals
- Stihl: 8 chain saw manuals, 4 chain saw parts lists, 2 bad links fixed