Rename highcharter example and add description

Change-Id: I06bd301c00e3e8ce7ae21784669602011e7507fa
diff --git a/demo/00Index b/demo/00Index
index f16c2dc..69f3901 100644
--- a/demo/00Index
+++ b/demo/00Index
@@ -4,4 +4,5 @@
 alternativesOverTime      Plot proportion of alternative spellings/variants over time
 regional                  Map plot regional frequencies of query expression
 mosaicplot                Visualize frequencies of alternative query terms in relation to other variables
+highcharter-example       Visualize frqequencies of optionally alternative terms over time with interactive HTML and JavaScript elements using the package highcharter as wrapper for Highcharts
 rcharts-highcharts        Visualize term frqequencies over time with interactive HTML and JavaScript elements