See bug #411786. Perl's random corruption of the taint flag is even effecting
the untainting of source filenames now (which AFAICS, is a proper untaint
and always worked before..), and that makes using ikiwiki in perl taint
mode not work at all.
* Add some code to the build system that tries to determine if the
lib installation directory is in @INC. If it's not, munge ikiwiki
to hardcode the path to the lib directory. This should allow installing
ikiwiki in nonstandard locations, including home directories, by just
setting PREFIX at build time.
* Fix nested examples directory in deb.