18 more tool manuals added

18 more tool manuals have been added to the site over the past couple of days, for the following tool brands:

DeWalt:
   - 2 saw manuals, 2 saw parts lists

Hitachi:
   - 1 saw parts list

Milwaukee:
   - 1 driver manual
   - 1 Hackzall manual
   - 1 wrench and driver manual
   - 1 Sawzall manual
   - 1 tubing cutter manual

Skil:
   - 1 grinder manual, 1 grinder parts list
   - 3 saw manuals, 3 saw parts lists