message: Add TypeDoc for FieldFunction type
diff: @@ -7,12 +7,12 @@ export const field: { [classUri: string]: FieldFunction } = {} // Form field fun
  export type FieldFunction = (
  dom: HTMLDocument, // the DOM
  - container: HTMLElement | undefined,
  - already: { },
  - subject: Node,
  - form: Node,
  - doc: Node,
  - callbackFunction: (ok: boolean, errorMessage: string) => void
  + container: HTMLElement | undefined, // if defined, the box will be appended to it
  + already: { }, // used to avoid looping in nested forms
  + subject: Node, // the thing for which data will be loaded into the form element
  + form: Node, // the RDF declaration for what the form should have
  + doc: Node, // the online RDF document for data binding (form input values will be read/saved automatically)
  + callbackFunction: (ok: boolean, errorMessage: string) => void // this will be called when data changes (TODO: check this with unit tests)
  ) => HTMLElement
  /**
  