visualization updates

update npm package.json file
changed name and description
updated vis version
added visualize menu, zoom affordance
zoom in and out
keyboard enabled
redraw on window resize
improve physics constants
update help files
fix ali's comments
turn authentication back on

Change-Id: I1a50552724cbda4f34f276acc1289f3c6e24839a
diff --git a/bower.json b/bower.json
index a322029..5e8f052 100644
--- a/bower.json
+++ b/bower.json
@@ -1,5 +1,5 @@
 {
-  "name": "veyron-browser",
+  "name": "viz-vanadium-viewer",
   "dependencies": {
     "polymer": "Polymer/polymer#~0.5.1",
     "core-elements": "Polymer/core-elements#~0.5.1",