Feature: Generate QC file from GeneCount.tab file of star

[giacuong171]

Is your feature request related to a problem? Please describe.
The '''ngs_mapping_counts_with_strand''' step should also generate a file, which contains the first 4 lines from the original *.GeneCounts.tab of star. This will be used for QC (you want to check the percentage of unmapped read, ...) and quantification of mapping.

Describe the solution you'd like
Changing the shell script in rule ngs_mapping_counts_with_strand