While I was there:
- complete overhaul of the CVS class
- fix open file issue w/ python3
- has_key() option was removed in python3
- usage simplified: there is no need to define the CVS filename, only the
  output folder, as for the HTML export
- update help, doc and man accordingly
- fix typos

Add new z key in man page

Add missing commands to man page.
Attempt to uniform all the info and use the same conventions all over the
place.

Monitored processes list is now client/server mode compatible / Add a new entry in the API to get the server monitored processes list

Fix various typos
Improve sensors section
Fix some glitches and add more niceness
Rename CSS file to style.css