split chapters in two folders

source folder contains chapters taken from original odt file
todo folder contains chapters from the last branch of harobed repository
add 3 chapters, text checked and corrected, figure captions improved.
delete obsolete files
refactor plot script as include (fix utf-8 chars in plot title)
added images to solutions chapter
add images to considerations generales
add more chapters and fix css
add more chapters and fix css
add missing images on chapters before history chapter
text, images, formulas are complete
Relecture : typographie

(cherry picked from commit e8c58e3bf2c2cb70ab48cd1a20abddd809759e3e)

Conflicts:
	source/comment-installer-une-monnaie-a-dividende-universel.rst
	source/considerations-generales.rst
	source/definitions.rst
	source/formalisaton.rst
	source/masse-monetaire-et-relativite.rst
	source/preface-de-la-version-1.0-par-Yoland-Bresson.rst
	source/probleme-de-la-monnaie-dette.rst
	source/probleme-de-la-valeur-de-reference.rst
	source/probleme-des-trois-producteurs.rst
	source/sources.rst
	source/sur-la-theorie-quantitative-de-la-monnaie.rst
	source/zooms-sur-l-histoire-de-la-monnaie.rst
fix oversized images in pdf