Add demo for corpus composition analysis

Change-Id: I5637199daadf23afd497c9384c67c64eb99a46fa
diff --git a/demo/Rmd/style.css b/demo/Rmd/style.css
index 3eace4d..9cd6cdb 100644
--- a/demo/Rmd/style.css
+++ b/demo/Rmd/style.css
@@ -51,3 +51,14 @@
   font-size: 16px;
 	text-align: center;
 }
+
+.highchart {
+    height: 200px;
+    float: left !important;
+    width: 50% !important;
+}
+
+.spacer {
+    height: 20px;
+}
+