• Added new not found page for development mode.
  
• Added EXPERIMENTAL url_with helper to Mojolicious::Plugin::DefaultHelpers. (diegok, marcus, judofyr, kraih)
  
• Added EXPERIMENTAL support for removing query parameters while merging to query method of Mojo::URL.
  (marcus, judofyr, kraih)
  
• Removed experimental status from Mojo::IOLoop::Delay.
  
• Removed defer method from Mojo::IOLoop.
  
• Improved exception page for development mode.
  
• Improved syntax highlighting in documentation browser slightly.
  
• Fixed Mojo::Command::app to be an attribute and not a method.
  
• Fixed Mojo::ByteStream, Mojo::Collection and Mojo::DOM to not be subclasses of Mojo::Base.