Switch to using jbuilder for JSON templates

app/views/api/notes/_note.json.jbuilder

@@ -2,7 +2,7 @@ json.type "Feature"
 
 json.geometry do
   json.type "Point"
-  json.coordinates [ note.lon.to_f, note.lat.to_f ]
+  json.coordinates [note.lon.to_f, note.lat.to_f]
 end
 
 json.properties do
@@ -16,12 +16,12 @@ json.properties do
     json.close_url close_note_url(note, :format => params[:format])
   end
 
-  json.date_created note.created_at
+  json.date_created note.created_at.to_s
   json.status note.status
-  json.closed_at note.closed_at if note.closed?
+  json.closed_at note.closed_at.to_s if note.closed?
 
   json.comments(note.comments) do |comment|
-    json.date comment.created_at
+    json.date comment.created_at.to_s
 
     if comment.author
       json.uid comment.author.id

app/views/api/notes/index.json.jbuilder

@@ -1,5 +1,5 @@
 json.type "FeatureCollection"
 
 json.features(@notes) do |note|
-  json.ingest! render(note)
+  json.partial! note
 end

app/views/api/notes/show.json.jbuilder

@@ -0,0 +1 @@
+json.partial! @note

app/views/api/notes/show.json.jsonify

@@ -1 +0,0 @@
-json.ingest! render(@note)