Make shiny frequency curves run as a proper R demo

Change-Id: I75dbfd97c98cd586f012e4d6409ed71d7745a201
diff --git a/demo/00Index b/demo/00Index
index f2e526a..4a9a3c8 100644
--- a/demo/00Index
+++ b/demo/00Index
@@ -5,4 +5,5 @@
 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
+shiny-frequency-curves    Web application that plots frequency curves with highcharts and shiny
 writtenVsSpoken           Compare frequencies in written vs. spoken corpora