First line to the gitignore file.

Signed-off-by: Esteban Torres <me@estebantorr.es>
Added documentation icon from (https://www.iconfinder.com/icons/70650/documentation_product_icon#size=128)

Signed-off-by: Esteban Torres <me@estebantorr.es>
Added the internal documentation html docs to the website.

Signed-off-by: Esteban Torres <me@estebantorr.es>
Added the documentation style.

Signed-off-by: Esteban Torres <me@estebantorr.es>
Added the documentation link to the header.

Signed-off-by: Esteban Torres <me@estebantorr.es>