- moved findStrings from stringList to new stringListOps
  (helps reduce the influence on dependencies)
- findStrings can also do partial matches

 - operator+=  : add in the listed keys
 - operator-=  : remove the listed keys
 - operator&=  : intersection of keys
 - added xfer constructor (just in case)
 - moved labelHashSet typedef to HashSet.H, for consistency with the
   wordHashSet typedef being there and since it is used so often

- drop copy components constructors in favour of the xfer versions. Even if
  the caller sends through constant data, if will be automatically promoted
  to xfer (via a copy operation).

- use xfer form for calls to resetPrimitives

 - it also found things like size_t instead of size_type in fileName class

  * output full file path
  * some preliminary file edits to restore 80-col max.