Optimized n+1 queries in accounts Atom and HTML views

Added stack trace for SQL queries in development
Removed badly thought out accounts/lookup API

config/routes.rb

@@ -56,10 +56,6 @@ Rails.application.routes.draw do
     resources :media,    only: [:create]
 
     resources :accounts, only: [:show] do
-      collection do
-        get :lookup, to: 'accounts/lookup#index', as: :lookup
-      end
-
       member do
         get :statuses
         get :followers