saugns v0.3.3. Wave type changes. Internal reworking. Wave type changes (rebased down to v0.2.14): * Use an anti-aliased cycle for the 'sqr' LUT, removing low-frequency noise, but still a bit rough; the new sound lacks full "bite" at low frequencies. * Do the same for the 'saw' LUT, with the same quality improvement (but a bit more "bite" preserved). The slope is now decreasing instead of increasing (can be changed with neg. amp. or freq.). * Remove 'shh' type (very similar to old 'saw'). Internal design change in preparation for future work, without functional change.