The 0 script now generates a logfile, and it's
more end-user-friendly. The hook subsystem has
been changed again, and the makefile helpers are
more powerful and easy to use. The documentation
has been improved.
Due to a design flaw, "Makefile" must be called
"Makefile.in" now. This prevents a nasty situation
where the end user could do "make" before
configuring the project with "0".