13 more tool manuals added

13 more tool manuals and parts lists have been added recently:

Cen-Tech:
   - 1 code reader manual

Delta:
   - 1 air compressor manual
   - 3 saw manuals

Husqvarna:
   - 1 power cutter parts list

Leatherman:
   - 1 multi tool user guide

Partner:
   - 1 power cutter manual, 5 power cutter parts lists