Uploading .fna references fails #68
Description
Does not recognize the extension, and gives an error of "This is an unknown file type.". This is despite renaming the file correctly into a .fasta file. It appears that there are all sorts of name-change things going on in scripts_genomes/process_input_files.genome.php, and in theory this should've been handled - but there's probably a bug somewhere. In any case, .fna should be accepted, or the bug should be fixed, and perhaps the code should be reviewed and simplified.