Add gis to BioSQL fetch queue if not present

[erikrikarddaniel]

Periodically sweep through the DbEntry objects and place gis that are not available from SLLBioSQL to its fetch queue.

[binnisb]

1. pfitmap scans db_entries for unique gis and compares with gis from sll_biosql.
2. pfitmap puts gis that exist in db_entries but not in sll_biosql in a queue in sll_biosql
3. sll_biosql fetches information for all gis that were missing from NCBI (bioruby) and stores the sequences + extra data in database (where and how?)
4. pfitmap fetches missing db_sequences from sll_biosql and stores the sequence on the db_sequence object

[binnisb]

Not enough to only save db_sequence since additional gis can be added after initial fetch. Add column:

fetched

to db_entry?

[erikrikarddaniel]

Fixed in 674af136882852ec96ad9b00de1ca5f7dda9e95b.