ENH : Generate CookBook for diapOTB (html and markdown)

.gitignore

doc_cookbook/Art/DIAPOTB_logo.jpg

doc_cookbook/Art/conf_chains/diapOTB_1_chain.png

doc_cookbook/Art/conf_chains/diapOTB_2_chain.png

doc_cookbook/Art/logo-with-text.png

doc_cookbook/_static/basic.css

doc_cookbook/_static/css/badge_only.css

doc_cookbook/_static/css/otb_theme.css

doc_cookbook/_static/css/theme.css

doc_cookbook/_static/doctools.js

doc_cookbook/_static/documentation_options.js

doc_cookbook/_static/file.png

doc_cookbook/_static/fonts/Lato/lato-bold.eot

doc_cookbook/_static/fonts/Lato/lato-bold.ttf

doc_cookbook/_static/fonts/Lato/lato-bold.woff

doc_cookbook/_static/fonts/Lato/lato-bold.woff2

doc_cookbook/_static/fonts/Lato/lato-bolditalic.eot

doc_cookbook/_static/fonts/Lato/lato-bolditalic.ttf

doc_cookbook/_static/fonts/Lato/lato-bolditalic.woff

doc_cookbook/_static/fonts/Lato/lato-bolditalic.woff2