(with one small bugfix in bgen/bgen/scantools.py)

This replaces string module functions with string methods
for the stuff in the Tools directory. Several uses of
string.letters etc. are still remaining.

change eliminate to delete (-d)

mislabeled.

(Using -c and then -e rearranges some comments, so I won't check that
in -- but it's a good test anyway.

Note that pindent is not perfect -- e.g. it doesn't know about
triple-quoted strings!)

Problem:
A Python program can be completed and reformatted using
Tools/scripts/pindent.py. Unfortunately there is no option for removal
of the generated "# end"-tags.  Although a few Python commands or a
"grep -v '# end '" can do wonders here, there are two drawbacks:
- not everyone has grep/time to write a Python script
- it is not checked whether the "# end"-tags were used validly

Solution:
add extra option "-e" (eliminate) to pindent.py

L.append(a,b,c,d) with the correct L.append((a,b,c,d)).

pindent.py: use /usr/local/bin/python;
pathfix.py: new script to fix #! lines in a group of scripts.

Added usage message to test program.