Built-in url shorter

> https://twitter.com/example
> On ZeroMe I'm:
> http://127.0.0.1:43110/Me.ZeroNetwork.bit/?> Profile/1GrEenUGRWnzaNZjR3XsQa6dQgdPDTyt7i/1PPVb3FDDiNyNqbdb5UAv8ykEC1K1Nwquy/quenz@zeroid.bit

-- [quenz on ZeroTalk](http://127.0.0.1:43110/Talk.ZeroNetwork.bit/?Topic:1_1PPVb3FDDiNyNqbdb5UAv8ykEC1K1Nwquy)

If twitter cooperated with third party micro-blogging services, the url will be something like `https://twitter.com/example@example.com`.
Thus I think ZeroMe should be shortened to something like `zero://Me.ZeroNetwork.bit/quenz@zeroid.bit`.
The `http://127.0.0.1:43110` can be shortened if a `zero//` protocol is supported on major browsers in future.
The `Profile/1GrEenUGRWnzaNZjR3XsQa6dQgdPDTyt7i/1PPVb3FDDiNyNqbdb5UAv8ykEC1K1Nwquy/quenz@zeroid.bit` could be shortened since we already trust `zeroid.bit` to maintain a list of IDs mapping to key. `zeroid.bit` could also maps hub address to key.