Option to flatten inheritance hierarchy

[RicoSuter]

Add an option to flatten the inheritance hierarchy when generating JSON Schema from a type:

public class AA
{
    public string FirstName { get; set; }
}

public class BB : AA
{
    public string LastName { get; set; }
}

public class CC : BB
{
    public string Address { get; set; }
}

Currently converts to:

{
  "typeName": "CC",
  "additionalProperties": false,
  "type": "object",
  "properties": {
    "Address": {
      "type": "string"
    }
  },
  "allOf": [
    {
      "typeName": "BB",
      "additionalProperties": false,
      "type": "object",
      "properties": {
        "LastName": {
          "type": "string"
        }
      },
      "allOf": [
        {
          "typeName": "AA",
          "additionalProperties": false,
          "type": "object",
          "properties": {
            "FirstName": {
              "type": "string"
            }
          }
        }
      ]
    }
  ],
  "$schema": "http://json-schema.org/draft-04/schema#"
}

And with this new option to:

{
  "typeName": "CC",
  "additionalProperties": false,
  "type": "object",
  "properties": {
    "Address": {
      "type": "string"
    },
    "LastName": {
      "type": "string"
    },
    "FirstName": {
      "type": "string"
    }
  }
}

[RicoSuter]

Added in v1.14, 57ff751

option FlattenInheritanceHierarchy