WIP. Implement oembed route and handle both json/xml for "Note" type activity

lib/pleroma/web/ostatus/ostatus.ex

@@ -31,7 +31,7 @@ defmodule Pleroma.Web.OStatus do
   def oembed_links(url) do
     Enum.map(["xml", "json"], fn format ->
       href = oembed_path(url, format)
-      "<link rel=\"alternate\" type=\"application/#{format}+oembed\" href=\"#{href}\""
+      "<link rel=\"alternate\" type=\"application/#{format}+oembed\" href=\"#{href}\">"
     end)
     |> Enum.join("\r\n")
   end

lib/pleroma/web/ostatus/ostatus_controller.ex

@@ -9,7 +9,6 @@ defmodule Pleroma.Web.OStatus.OStatusController do
   alias Pleroma.Web.ActivityPub.ObjectView
   alias Pleroma.Web.ActivityPub.ActivityPubController
   alias Pleroma.Web.ActivityPub.ActivityPub
-  alias Pleroma.Router.Helpers, as: Routes
 
   plug(Pleroma.Web.FederatingPlug when action in [:salmon_incoming])
   action_fallback(:errors)