Some links on all this

Official FIA statement
Ferrari team boss Jean Todt's comments
FIA summons teams to World Motorsport Council hearing in Paris
List of FIA charges against the Michelin teams

About the slowing down, I believe Jean Todt suggested the Mich teams could have gone through the pit lane on each lap... but then of course some drivers would skip it to gain an advantage, and then everyone would do it, and it would be no safer. Really, when you think about all the possiblities, pulling out was the safest option.