Lyluatex 1.0 beta

Many new options and improvements. Those must especially be noted:

• protrusion;
• ability to pass the fonts of the document to LilyPond, to harmonize the scores with the rest of the document;
• a full manual;
• Lyluatex now accepts all relevant options of lilypond-book;
• ability to include "fullpage" scores.

Many thanks go to @uliska, especially for the work on protrusion, fonts and manual.