Revamped the initial generation of stos maps.
Stos maps now detect new sections and fill in holes in the existing stos map.
Sections listed as not being possible controls are now correctly skipped when building the map.
Construction of the final stos map may need some tweaks to move the changes from the provisional stos map forward gracefully.

This should reduce the manual patching done when large volumes are merged.
Fix bugs found during testing
Merge branch 'dev'