Document Rc<T>

*reads* through actual source. Okay, better understand how this thing works now. Rc and Weak are interfaces to a single item on the heap with a strong and a weak count. When the strong count drops to 0, it calls the object's destructor. When the strong *and* weak count drop to zero, it frees up the memory.

I'd prefer if the docs distinguished between the weak and strong reference counts.