denitrification UniProt update

[immanuelazn]

Retrieved the uniprot database files manually from uniprot using assign/update:

 name: "periplasmic nitrate reductase" napa NOT taxonomy:"uncultured bacterium" (148 reviewed, 8038 unreviewed)
 name: "nitrate reductase" gene:nari NOT taxonomy:"uncultured bacterium" (2 reviewed, 5752 unreviewed)
 name: "copper-containing nitrite reductase" gene:nirk NOT taxonomy:"uncultured bacterium"  (7 reviewed, 3046 unreviewed)
 name: "nitrous-oxide reductase" gene:nosz NOT taxonomy:"uncultured bacterium" (12 reviewed, 5707 unreviewed)
 name: "nitric oxide reductase" gene:norb NOT taxonomy:"uncultured bacterium" (2 reviewed, 1412 unreviewed)

Old files are put into archive folder, and purity assessment is also provided for each update.