Fixed loading of error pages (#310)

* <Fixed loading of error pages>

* <Remove not_found from application folder>

.rake_tasks~

@@ -0,0 +1,42 @@
+about
+app:template
+app:update
+assets:clean[keep]
+assets:clobber
+assets:environment
+assets:precompile
+autoprefixer:info
+cache_digests:dependencies
+cache_digests:nested_dependencies
+conf:check
+db:create
+db:drop
+db:environment:set
+db:fixtures:load
+db:migrate
+db:migrate:status
+db:rollback
+db:schema:cache:clear
+db:schema:cache:dump
+db:schema:dump
+db:schema:load
+db:seed
+db:setup
+db:structure:dump
+db:structure:load
+db:version
+dev:cache
+initializers
+log:clear
+middleware
+notes
+notes:custom
+restart
+routes
+secret
+stats
+test
+test:db
+time:zones[country_or_offset]
+tmp:clear
+tmp:create