Average line added to RSCU difference chart

Signed-off-by: Joseph Lee <josel@pdx.edu>
Combined "Stop" sequences to one chart

Signed-off-by: Joseph Lee <josel@pdx.edu>
Main Codon Distribution single chart w/averages

Signed-off-by: Joseph Lee <josel@pdx.edu>
Removed border of RSCU regression chart

Signed-off-by: Joseph Lee <josel@pdx.edu>