15 more chain saw manuals added

15 more chain saw manuals and parts lists were added recently:

- Craftsman: 3 chain saw manuals
- Homelite: 1 chain saw parts list
- Jonsered: 1 chain saw manual, 2 chain saw parts lists
- Makita: 1 chain saw manual
- Oregon: 1 chain saw parts list
- Scotts: 4 chain saw manuals, 1 pole saw manual
- Yardworks: 1 chain saw manual