Reorganisation du code + modifications after reviews

After reviews of Florent & Kaze and advices from Kaze about the
"organization" of the code. I put libraries (OpenLayer et WebL10n ) in
folder "libs". I edited runrunrun.js after review of Florent (aka ??)
Timer on the sat's fixation.

there was a max limit about the accuracy. Desktop's user can't use the
app. Now there's a confirm box. You can abort the fix or continue.