Specify table name for object in data schemas

[PhilipSkinner]

Allow the table name for a given object to be configurable within the data type definition.

This table name needs to be separate from the name of the data type:

{
  "name": "todoList",
  "tableName" : "todo_list",
  "keys": [
    {
      "type" : "unique",
      "paths" : "$.name"
    }
  ]
}