of-10141-0082, of-10141-0083, of-15845-0001, of-15845-0004 built

* renumbered ulinks (not in of-15845-0001 and of-15845-0004 yet)

* all tools work with github tree (/var/www symlinked to the source tree)

* convert-kamis-txt-to-tsv.pl: dos2unix

* prepare-book.pl: synced with prod

* +x *.pl