New version - better collissions

Hi everybody!

Thanks for trying Mojizx.

When dealing with fast moving objects, that are character sized and also are moving one character at the time, its very common, yo have moment that you miss collissions, some object go over another, or sometimes appear that some object swap places!!

So I implemented some more routines to check if the objects are close enough and if the trayectories would make them collide.

I think it improved a lot.

Also tested the kempston joystick and it seems working fine.