don't dropna DW lines on sample group name
Keep DW lines even if sample group name is empty. Added new func to remove None values from list if there are other values as well in that list. Also added ribokmer_reads_ratio stat from RQC to Lib_QC.txt.
Keep DW lines even if sample group name is empty. Added new func to remove None values from list if there are other values as well in that list. Also added ribokmer_reads_ratio stat from RQC to Lib_QC.txt.