Add robots.txt, cleanup config.js list

src/robots.txt

@@ -0,0 +1,3 @@
+# http://www.robotstxt.org
+User-agent: *
+Disallow:

src/views/layout.jade

@@ -7,6 +7,8 @@ html(ng-app="netStatsApp")
     style(type="text/css") [ng\:cloak], [ng-cloak], [data-ng-cloak], [x-ng-cloak], .ng-cloak, .x-ng-cloak { display: none !important; }
     link(rel='stylesheet', href='//fonts.googleapis.com/css?family=Source+Sans+Pro:200,300,400,600,700')
     link(rel='stylesheet', href='/css/netstats.min.css')
+    meta(name='robots', content='index,follow')
+    meta(name='googlebot', content='index,follow')
   body
     block content