saugns v0.4.0c. Some further noise feature additions. Language changes: * Signal generator types. Add 'R' mode 'm' flag 'v' -- to select from a set of violet noise functions instead of white noise functions, when available. (Currently missing for the 'g' and 't' functions.) * Line types. Add 'uwh' (uniform white noise) -- makes a sweep use uniform random numbers in the start–goal range, and R produce chunks of noise with a random amplitude and DC offset each (if using the default mode). Fix a minor parsing bug for unary sign without surrounding parentheses, causing bogus warning in scripts about missing whitespace afterward. Add, update, replace some 'R' example scripts. The new versions match the new online examples found at <https://sau.frama.io/examples.html>.