• Reverted a previous change to Mojo::Loader that allowed for load_class to be called on the same class multiple
  times, since it had very bad side effects.
  
• Improved Mojo::IOLoop::TLS to use a little less memory.
  
• Fixed a bug where Mojolicious controllers like "MyApp::Controller::Foo::Bar" would disappear if loading the
  controller "MyApp::Controller::Foo" was attempted but failed.