rename reference to github repository castorcad into demo
Rename reference to github organization ConnectedSets as ReactiveSets, and some uses of ReactiveSets as Toubkal
Rename "Connected Sets" in Copyright statements as "Reactive Sets"
Replace references to "Connected Sets", the product, with Toubkal, as well as some references of XS, the product as Toubkal.
NPM package name is now toubkal, version 0.2.7, author is Reactive Sets, remove some keywords