* lily/ly-module.cc (LY_DEFINE): bugfix.

* lily/ly-module.cc (LY_DEFINE): bugfix.

* lily/paper-book.cc (book_title): separate function for the book
title.

* scm/page-layout.scm (default-book-title): only account for
markup fields.

* scm/framework-ps.scm: new file. Move high level interface from
output-ps.scm

* scm/framework-tex.scm (dump-line): new file. High level
interface for output (pages, systems, header).

* lily/paper-book.cc (split_string): new function
(output): output multiple formats, i.e. --format=ps,tex

* scm/output-ps.scm (output-scopes): dump variables directly.
(define-fonts): rewrite for new interface

* ps/lilyponddefs.ps: remove lilypondpaper redefinitions.