readout the file

Can read out the file
bypass the comment lines
simplify
read into x y z
print out 5 lines
add log2tree
save tree good
clean log2tree
return tree as object from log2tree
must save root file
first version
add log2tree
fix the PROG bug
take advantage of the PATH
can draw
draw the abs plot
fix the arg3 bug
fix arg3 bug