Update what mix generates (#2212)
Update what mix generates (#2212)

`mix new example` doesn't generate  a `config` folder and `config/config.exs` anymore.
nscyclone/elixir-school,doomspork/elixir_school,nscyclone/elixir-school,doomspork/elixir-school,doomspork/elixir-school,doomspork/elixir_school,nscyclone/elixir-school,doomspork/elixir-school,doomspork/elixir_school,nscyclone/elixir-school