graph_io under construction
This is a working version, but needs more improvments.

todo:
documention + fix the file format
improve the exception system

add some possible asserts

tutorials

 BINARIES = kruskal_test ma_order_test

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

 include ../makefile