Adding examples to command descriptions

Transcribing the command descriptions from webi.py into compstrm.org is a slow process. But its a good review--I've already found the demote command had an obsolete description.

But it is also a great opportunity to add value. Look at ReadMe/CswCmd/dCmd for example. This is a complex command and I've now clairified it a bit with some examples. And of course I'm weaving in a lot of topical references. It should all be quite nice once those topics are developed.