SF Features#115: Part 1. Add the ability to Geotag multiple images against a Waypoint.

SF Features#115: Part 1. Add the ability to Geotag multiple images against a Waypoint.

Reuse the general Geotagging Dialog and disable the create/update waypoint options when invoked on a waypoint.
When run against waypoints simply use the position of the waypoint to geotag each image (no interpolation required).

Add feedback to the statusbar should writing the EXIF fail.

Update the manual accordingly.