A machine readable format in JSON.

The JSON structure is like the following example:

{
  "metadata": {
    "dogma_version": "0.3.0",
    "elixir_version": "1.0.5",
    "erlang_version": "Erlang/OTP 10 [erts-7.0.3] [64-bit]",
    "system_architecture": "x86_64-apple-darwin14.5.0"
  },
  "files": [{
      "path": "lib/foo.ex",
      "errors": []
   }, {
      "path": "lib/bar.ex",
      "errors": [{
          "line": 1,
          "rule": "ModuleDoc",
          "message": "Module without @moduledoc detected"
       }, {
          "line": 14,
          "rule": "ComparisonToBoolean",
          "message": "Comparison to a boolean is useless"
       }
      ]
  }],
  "summary": {
    "error_count": 2,
    "inspected_file_count": 2
  }
}