Incremental import using OIDtype incremental

[kjdon]

Can we make incremental import work using OIDtype incremental? Each import could create a top level folder, F0, F1... and then use that name in the import, get oids like F0D1, F0D2 etc. Next import (if -keepold/incremental is switched on) you look to see what folder you are up to, and start from there. I guess you could also do this without folders, just looking at the D0, D1 folders to see what number we are up to. But it would be faster with top folders. And also its easier to see what happened at each separate import.