[#983] Make Json.reads output a shiny error on Empty case class
[#983] Make Json.formats output a shiny error on Empty case class
[#983] Make Json.writes output a shiny error on Empty case class
[#983] Ask user if he is using a case class
Merge pull request #1879 from baloo/defect/983-Macro-format-empty-parameters

[#983] macro format empty parameters