changed hist_gnu from return type into to void
added gau_df.h
added cau_df.h
removed some old git files
made progres on pds.cpp and made lots of small fixes
fiished pds.cpp however gives incorrect output due to error in one of the gamma files
finally got incomplete gamma stuff working
finished a02.01.02
finished assignment a02.01.03
removed ranmar.txt
added gitignore and removed unwanted files