update the iframe route, fix a small styleing thing in newspaper style for iframe view

app/assets/stylesheets/new_styles/_base.scss

@@ -194,7 +194,7 @@ article { //mood posts
     text-align: left;
 
     .container {
-      width: 600px;
+      max-width: 600px;
     }
 
     .photo_viewer {

config/routes.rb

@@ -19,7 +19,7 @@ Diaspora::Application.routes.draw do
   match "/framer" => redirect("/posts/new")
 
   get 'p/:id' => 'posts#show', :as => 'short_post'
-  get 'p/:id/iframe' => 'posts#iframe', :as => 'iframe'
+  get 'posts/:id/iframe' => 'posts#iframe', :as => 'iframe'
 
   # roll up likes into a nested resource above
   resources :comments, :only => [:create, :destroy] do