Initial d3 graph commit. Add d3 to graph layout

applications/admin/views/appadmin.html

@@ -258,6 +258,19 @@
   {{pass}}
 {{pass}}
 
+{{if request.function=='d3_graph_model':}}
+<h2>{{=T("Graph Model")}}</h2>
+<div id="vis"></div>
+<link rel="stylesheet" href="{{=URL('static','css/d3_graph.css')}}"/>
+<script>
+    // Define the d3 input data
+    {{from gluon.serializers import json }}
+    var nodes = {{=XML(json(nodes))}};
+    var links = {{=XML(json(links))}};
+    d3_graph();
+</script>
+{{pass}}
+
 {{if request.function == 'manage':}}
 <h2>{{=heading}}</h2>
 <ul class="nav nav-tabs">

applications/admin/views/default/design.html

@@ -105,7 +105,11 @@ def deletefile(arglist, vars={}):
         {{if os.access(os.path.join(request.folder,'..',app,'databases','sql.log'),os.R_OK):}}
             {{=button(URL('peek/%s/databases/sql.log'%app), 'sql.log')}}
         {{pass}}
+        {{if os.access(os.path.join(request.folder,'..',app,'static','js','d3_graph.js'),os.R_OK):}}
+                {{=button(URL(a=app, c='appadmin',f='d3_graph_model'), T('graph model'))}}
+        {{else:}}
                 {{=button(URL(a=app, c='appadmin',f='graph_model'), T('graph model'))}}
+        {{pass}}
     </div>
     <ul class="unstyled act_edit">
         {{for m in models:}}