support export/import mappings via sc-list.txt

[adaptun]

Also ability to read sc-list in old and new format

[eduard93]

what's the new format?

[adaptun]

no new format yet.
currently sc-list.txt stores only versioned files list.

Plan is to also store mappings (see 35da094).

Idea is to have sc-list something like follows:

[list]
<list of versioned files>
[mappings]
<list of mappings>