Fixes Yoshi's hitbox

1) Removes garbage code.

2) Fixes Yoshi hitbox versus Mario: contact if and only if their lines
are going to overlap. Also, better hitbox versus enemies when Mario is
mounted.

3) Block drawing: it vanishes only when offscreen now.

4) Movie info: the * appears when the user loads a state or, in general,
is not frame advancing.

5) Better colors for the countdown timers.