- add createfiles instructions of packageManager.xml for new book too
- remove unneeded chown when installing pacman (not needed thanks to
the above)
- Use a dedicated user "builder" for running makepkg: user "tester" is
removed at the end of chapter 8, but is needed in following chapters.
- major number can be on 4 digits, so use it in packInstall
- minor number (for package manager) can be greater than 10
- code on 2 digits
- change various files accordingly
