-------------------------- About the Current Version -------------------------- The live version of this document is available at `this link. `_ I'll make the ePub and PDFs available here at a later point. This book in its current form corresponds to the 6th Draft of this work. This version is hereafter labelled version |version|, corresponding to |release|. The changes hereafter break several continuities in the previous version and must be considered to supercede the previous drafts.