fbshare module (+ https everywere)

fbshare module (share via facebook):
* Has "privacy":"safe" (a simple link).
* demos/fbshare.html shows how it looks in line and box layouts

https everywhere:
All modules now use SSL whether current location is https or not.

It's true that a local adversary (e.g. at the ISP) can learn that
I'm visiting a specific http page, but if I *share* this page via
a social network in *plaintext*, this might help the adversary
deanonymize my social network account :(