* src/saba/sabacomplementtgba.hh,
src/saba/sabacomplementtgba.cc: New.  The algorithm.
* src/saba/Makefile.am: Adjust.
* src/sabatest/sabacomplementtgba.cc, src/sabatest/Makefile.am,
src/sabatest/defs.in: New.  Test the algorithm.
* configure.ac, src/Makefile.am: Adjust to the new directory
`sabatest'.