complete taxon information with subtribes

[mfrasca]

at the moment we have a database with 28970 taxa, but not all of them have all the complete authorship information: (rank 0: order; 1: family; 2: subfamily; 3: tribe; 4: subtribe; 5: genus) - as you see, 4 is empty.

sqlite> select rank, count(*) from taxon f group by rank;
0|68
1|1388
2|348
3|240
5|26926

[mfrasca]

added 51 subtribes in the orchids family

sqlite> select rank, count(*) from taxon f group by rank;
0|68
1|1388
2|348
3|253
4|51
5|26926