Rename two inspector methods.
Purge NSDocument system from app.

* Redirect action for the Print menu command.

* Redirect app role from Editor to Viewer. Fix how app declares to open
  all files.

* Rename the document's (only) window XIB to be the browser window XIB.
  Use the app's name as the window's default title.

* Repurpose the document class to the browser window's controller class.

    ** Rename the class

    ** Change base class from NSDocument to NSWindowController.

    ** Publicize the method to load a URL to a browser window, so the
       app delegate can see it.

    ** Take over action to save loaded resources to disk.

* Move browser window (and controller) raw creation method from
  controller to app delegate.

* Adapt app delegate for taking over NSDocumentController's role.

    ** Take over action to create browsers starting at a default state.

    ** Take over action to create browsers starting at a given file.

    ** Take over lifetime management of browsers and their controller
       objects.