Polya trimming correction
Closes issue #98 (closed) Modified the samples.tsv to include poly-a for the 3p and 5p to match the cutadapt options -a -g -A -G. Empty variables are substituted by 'XXXXXXXXXX' so that they are not trimmed by cutadapt.
Closes issue #98 (closed) Modified the samples.tsv to include poly-a for the 3p and 5p to match the cutadapt options -a -g -A -G. Empty variables are substituted by 'XXXXXXXXXX' so that they are not trimmed by cutadapt.