added GChartWrapper to requirements
diff --git a/requirements.txt b/requirements.txt
index f3fd43f..b5577c0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,3 @@
 argparse==1.2.1
 wsgiref==0.1.2
+GChartWrapper
\ No newline at end of file