allow flag_pick, like pick but just indicates with flag
add code to retrieve HGNC ID, which is more stable than the gene symbol itself
add HGNC_ID column description
add code for fetching Uniprot IDs, also remove post-fetching code that was messy, duplicating effort, and only used when using --database without --prefetch

Conflicts:

	modules/Bio/EnsEMBL/Variation/Utils/VEP.pm