New screenshots and sound examples

Pre­sent­ed here are screen­shots and sound exam­ples like­ly to be rep­re­sen­ta­tive of the final prod­uct. Com­pared to the lat­est pub­lic release (0.4a), the algo­rithm is now improved sig­nif­i­cant­ly with­out tax­ing too much on the CPU. Also, the work on the user inter­face is now most­ly fin­ished.