saugns v0.4.0. Add 'R' random segments generator. Language changes: * Rename generator type 'O' to 'W'. [Add backward-compatibility deprecated alias.] * Add generator type 'R' (Random segments generator). It shares most parameters with type 'W'. * Rename sweep subparameter 'r' to 'l' (line fill type). [Add backward-compatibility deprecated alias.] Also, new example scripts actually worth listening to (much more so than the old). The design is minimally adjusted in this version; the main thing is that there's now a full-featured second audio generator available. More OO redesign will be done for adding further generator types. The "N" noise generator in the 2023-01 "mgensys" version ('old-dev_202301' git branch) is still left to bring into this main branch/program, but everything else of value is available, in a better, more polished program.