Initial script to map MGI
Initial script to map MGI

The idea is to create scripts similar to that of HGNC import. We will
map the ids MGI provides to accessions that have already been imported.
We will then store the data as with HGNC. This initial script doesn't
work yet but outlines the logic I will use.

RNAcentral/rnacentral-webcode,RNAcentral/rnacentral-webcode,RNAcentral/rnacentral-webcode,RNAcentral/rnacentral-webcode