Why is this a Moore and not a Mealy FSM?
As written there, 
"Moore outputs are synchronous with the clock, only changing with state transitions. Mealy outputs are asynchronous and can change in response to any changes in the inputs, independent of the clock."
In your specific case, Q0 and Q1 change sinchronously with the clock (because of the presence of the two D flip-flops), hence it's a Moore FSM.