Adding public following and followers pages, fix #3

spec/controllers/xrd_controller_spec.rb

@@ -2,7 +2,7 @@ require 'rails_helper'
 
 RSpec.describe XrdController, type: :controller do
   describe 'GET #host_meta' do
-    it 'returns 200' do
+    it 'returns http success' do
       get :host_meta
       expect(response).to have_http_status(:success)
     end
@@ -11,12 +11,12 @@ RSpec.describe XrdController, type: :controller do
   describe 'GET #webfinger' do
     let(:alice) { Fabricate(:account, username: 'alice') }
 
-    it 'returns 200 when account can be found' do
+    it 'returns http success when account can be found' do
       get :webfinger, resource: "acct:#{alice.username}@anything.com"
       expect(response).to have_http_status(:success)
     end
 
-    it 'returns 404 when account cannot be found' do
+    it 'returns http not found when account cannot be found' do
       get :webfinger, resource: 'acct:not@existing.com'
       expect(response).to have_http_status(:not_found)
     end