a little bit more about the compare tool in the README file

diff --git a/README b/README
index d1cc799..6cfaa1e 100644
--- a/README
+++ b/README
@@ -542,7 +542,10 @@ For instance, 'sampleIBD1/sampleIBD2' are ORF generated with RACS, while
 eg.
 		ibdX(sampleIBD1,macsIBD1, "comparison_ibd1.pdf")

-
+several static PDF plots would be generated, as well as, interavtive plots
+generated using the plotly library which would be stored in HTML files.
+
+

 * CITATIONS