src/work/Doxyfile: Minor changes

* include \internal documentation
* input whole directories: marci, alpar, deba, klao
* sync to doc/Doxyfile

 BINARIES = kruskal_test ma_order_test

 INCLUDEDIRS= -I. -I.. -I../../include -I../{marci,jacint,alpar,klao,akos}

 include ../makefile