Make shiny frequency curves run as a proper R demo

Change-Id: I75dbfd97c98cd586f012e4d6409ed71d7745a201
diff --git a/.gitignore b/.gitignore
index 9df09e9..04ac529 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,3 +4,4 @@
 .Ruserdata
 cache/
 docs
+*.log