Doto demo site is launched

This is a demo site, very thanks to 头太晕, it's he provide me this site,
and the domain will be changed to  doto.letme.cn  later. Now you can
test it. And there is also a bug or shortcoming which I've not fixed
yet, that's when you register an account, you shuld click settings
first, this will let doto create UserProfile info. I'll fix it later.

So hope you have fun. And Doto support share todos to others, so if
you have friends, you can tell him to sign up an account also, and
share some todos with him.

Again, thanks, 头太晕，and this is only a demo site, so don't put
important things on it.

Visit:  http://www.letme.cn
Later should be:  http://doto.letme.cn