Moving Salmon notifications to background processing, fixing mini-profiler

behaviour with Turbolinks enabled, optimizing Rabl for production

config/initializers/rabl_init.rb

@@ -1,3 +1,6 @@
 Rabl.configure do |config|
+  config.cache_all_output  = true
+  config.cache_sources     = !!Rails.env.production?
   config.include_json_root = false
+  config.view_paths        = [Rails.root.join('app/views')]
 end