* clean does not work well. Maybe have "clean" and "mrproper"? ;)

* Work out the details of the mail target. The dependiecies are not properly
  set. [fixed. verify it works]

* the "vars" target should probably be done with an extrnal script.
  Have a look at debian's make-kpkg wrapper of a makefile

* support for makeindex is not good. It causes latex to always be re-run
  
  The cause for that is that the second run of latex creates a new .ind
  file.
  
  Should I skip the seperate index (and bibtex) targets?

* Add TEXMF, SYSTEXMF, HOMETEXMF etc. variables, that will be used for 
  latex, dvips and xdvi

* Add a -s (--select) command-line option to set_makefile to manually select
  makefile from a list. Or make this the default when no parameter is given.

* Give samples "projects": lyx, seminar