Improvements for creating the NCBI schema on uta

[andreasprlic]

I had several requests of getting Entrez gene id to RefSeq transcript associations in uta. This PR adds several improvements to the ncbi database and adds a new table to it, that contains the following IDs: hgnc, transcript, genebank ID, protein accession.

Here the example for data for BRCA1:

hgnc	tx_ac	gene_id	pro_ac	origin
BRCA1	NM_007294.3	672	NP_009225.1	NCBI
BRCA1	NM_007297.3	672	NP_009228.2	NCBI
BRCA1	NM_007298.3	672	NP_009229.2	NCBI
BRCA1	NM_007299.3	672	NP_009230.2	NCBI
BRCA1	NM_007300.3	672	NP_009231.2	NCBI
BRCA1	NR_027676.1	672	-	NCBI
BRCA1	NM_007295.2	672	-	NCBI
BRCA1	NM_007296.2	672	-	NCBI
BRCA1	NM_007301.2	672	-	NCBI
BRCA1	NM_007302.2	672	-	NCBI
BRCA1	NM_007303.2	672	-	NCBI
BRCA1	NM_007305.2	672	-	NCBI
BRCA1	NM_007306.2	672	-	NCBI