src/work/Doxyfile: Minor changes

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

BINARIES = bfs_test min_cost_flow

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

include ../makefile