Set up programmatic retrieval of most up to date (current) TAIR GAF file from GO

[lreiser]

iFAD needs to read the most current GO annotation data files for TAIR.
These can be retrieved either from the GO website
http://current.geneontology.org/products/pages/downloads.html
or the Zenodo repository
a description of how to programmatically access GAF files from Zenodo can be found here:
http://geneontology.org/docs/tools-guide/#programmatic-download-bdbag

TAIR updates OUR gaf files on a quarterly basis . These files are consumed by the GO consortium, post processed to remove errors and then merged with annotations from other sources.

[lreiser]

We need to discuss the process of retrieving the unique gene IDS from the GO GAF file. Because some of the data comes from sources other than TAIR, in addition to searching in Column 11 for the AGI code (ATNGNNNNN) we need to look in Column 3 which is where UniProt puts the identifier.