Update version 1.54 released.

This is a small patch including jumping buffer for both normal and wall jumps and a fix for the map screen, where pressing 'return' on the keyboard caused the game to quit. [h1]What does jumping buffer means?[/h1] It's very simple, up until now for jumping to work you had to be on the ground or near a wall, now you get a few extra frames of buffers for any jump request, so if you hit the button slightly before you hit the ground or the wall, the jump will still register.