1.0.0: first numbered version

This version number is mostly intended for the <peakdet_inter> script, which needs versioning. Its current version is labelled as a first version (1.0.0). The next landmark will be version 1.1, incorporating improvements to the back-end planned in the course of 2019.

A side benefit of the version number is that it can also be used to refer to a specific state of the repo as a whole, including the gallery of electroglottographic signals.