Initial dash forward

[atvo912]

If you dash forward while not already in dashdance, you must dash forward initially for at least 3 frames before you can input a dash back. For any dashes which take place after a smash turn (i.e. an initial backdash, or any subsequent dashes), you can turnaround/dashback any time as soon as DASHING frame 1.

Right now, libmelee does not keep track of whether or not you're in this "initial dash" state