Set up book title to be available for placeholder replacement

rector and codesnifffer fixes

fixed issues from first real run

more refactoring

The basic handling of page collecting, caching and rendering is now
defined.

There is still some ugly dependency in the renderer and the
ImageProcessor loading is not reimplemented

more refactoring

The basic handling of page collecting, caching and rendering is now
defined.

There is still some ugly dependency in the renderer and the
ImageProcessor loading is not reimplemented yet.

After the above a first attempt to actually run the code can be made.

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first start at refactoring

We now have a few classes that separate the concerns

DokuPDF - inherits from mPDF and doesn't do much anymore except for a
few internal defaults and overwrite

first start at refactoring

We now have a few classes that separate the concerns

DokuPDF - inherits from mPDF and doesn't do much anymore except for a
few internal defaults and overwrites
Config - encapsulate the configuration (file and input vars) and created
an mpdf config array
Template - handles loading the template files and applies placeholders
Writer - composites the above classed and gives access to write
operations

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