Added custom download glyph.

Change-Id: Ic167ed17c419faadb5f7dac4993fc089af68ed87
diff --git a/web/gui/src/main/webapp/app/fw/svg/icon.js b/web/gui/src/main/webapp/app/fw/svg/icon.js
index aabbc17..5dc8a3d 100644
--- a/web/gui/src/main/webapp/app/fw/svg/icon.js
+++ b/web/gui/src/main/webapp/app/fw/svg/icon.js
@@ -37,6 +37,7 @@
         play: 'play',
         stop: 'stop',
 
+        download: 'download',
         delta: 'delta',
         nonzero: 'nonzero',
         close: 'xClose',