15 more tool manuals added

15 more tool manuals and parts lists were added recently:

Astro Pneumatic:
   - 1 cut-off tool parts list

Hitachi:
   - 1 drill manual

Husqvarna:
   - 2 power cutter manuals, 3 power cutter parts lists
   - 1 saw parts list

Partner:
   - 1 power cutter manual, 3 power cutter parts lists, 1 power cutter workshop manual

Porter-Cable:
   - 1 saw manual

Powertec:
   - 1 saw stand manual