NCBIProteinToPyeeddoes not extract locus_tag from entry

[haeussma]

Currently, the NCBIProteinToPyeed does not extract the locus_tag from the "CDS" in the "FEATURES" section of the entry. The locus tag information is necessary to identify which part of the DNA entry codes is responsible for the protein.

In a subsequent step, the nucleotide_id, together with the locus_tag attribute of a Protein, can be used directly to fetch the corresponding DNA sequence of a protein. In that process, the (DNA)-(ENCODE)-(Protein) edge can be created with the information from the DNA entry.