Fix zero init of struct WAY (again).

Fix zero init of struct WAY (again).
1) snlen suboption  now allows forced shortname lengths.
2) snwhite suboption now allows generated shortnames to contain
        no whitespace.
3) icons are now mapped by geocache type, just as with Mapsource.
4) Waypoint comment now contains difficulty and terrain when available.
5) I added ascii dump of data written to the Garmins in addition to hex.