13 more tool manuals added

13 more tool manuals have been added to the site for the following brands:

Diamond Products:
   - 2 grinder parts lists
   - 1 saw manual, 1 saw parts list

Hitachi:
   - 1 drill manual, 1 drill parts list
   - 3 driver parts lists
   - 1 grinder manual, 2 grinder parts lists
   - 1 impact wrench parts list