16 more auto manuals added

16 more manuals and guides were added for the following brands:

Buick:
   - 3 owner's manuals
   - 1 system/accessory manual

Chevrolet:
   - 2 owner's manuals
   - 1 quick reference guide

Honda:
   - 3 online reference owner's manuals
   - 1 quick start guide
   - 1 technology reference guide
   - 3 navigation system manuals
   - 1 remote starter quick start guide