The rule creator for MultiModalKD does not do anything but calling the
one of MultiModalK.

Use -include directive to tell Make that Make itself has to create the
.depend file. Therefore, add a .depend target in addition to the phony
depend target.

Look for headers in . as well, just to make sure it works for those
having minisat-includes saved in the project directory.

Include minisat- and caml-includes via #include <..> to make their
location in the file system configurable

It contains the most current tarball created by the original author
Florian Widmann.