saugns v0.3.6f. Reduce diff for upcoming redesign. Reduce differences for various smaller modules with the 2020-06 "mgensys" redesign experiment now in the "old-dev_202006" branch. Relicense many small modules permissively (ISC license), while saugns as a whole is still LGPL'd. Change default sample rate to 96000 Hz, undoing the 2012-02-10 change to 44100 Hz. Change the -h option to list topics available with -h <topic>. For now, only other lists are available, the first built-in help consisting of a 'wave' type list and a 'ramp' list. Rename "loader/" to "reader/". Apart from the mentioned changes to options, should be functionally the same as v0.3.6e.