Need API to iterate by sequence

ForestDB's public API allows you to iterate by document ID, but not by sequence number. By-sequence iteration will be required to use ForestDB for Couchbase Lite, both for indexing and for sync.

For example:

fdb_status fdb_sequence_iterator_init(fdb_handle *handle,
fdb_iterator *iterator,
fdb_seqnum_t start_seq,
fdb_seqnum_t end_seq,
fdb_iterator_opt_t opt);