add drawing for presentation.
new file:   drawing.svg: import kite and wind picture.
setup draft drawing.
modified:   drawing.svg: add electricity and WindEEPP base system.
add title and text.
modified:   drawing.svg: add title and text description in french.
add PDF output of drawing.svg
new file:   drawing.pdf: print to from InkScape.
modified:   drawing.svg: small modification.
add GitHub readme file.
new file:   README:  GitHub readme.
modified:   _info.txt: small changes.
modified:   drawing.pdf: updated.
modified:   drawing.svg: redraw ropes; add GitHub address.