Handle empty parse from ensembl by warning and continuing
Handle empty parse from ensembl by warning and continuing

This came from an error with Anas platyrhynchos in which I had one 
chromosome that had no valid ncRNAs in it. While this appears to have 
been legitimate when I inspected the file, blanket ignoring empty parses 
is risky. Therefore, this addition will let us know enough details to 
reproduce the empty parse and verify it

Also, Black reformatted some stuff

RNAcentral/rnacentral-import-pipeline,RNAcentral/rnacentral-import-pipeline,RNAcentral/rnacentral-import-pipeline,RNAcentral/rnacentral-import-pipeline