[gnulib-tool-py] Command-line parse and options

[Dmitriy Selyutin]

Hi everyone,

It seems that I've solved compatibility problems with strings and bytes. It was too late, Bruno, when your letter came, I've already made changes. But I think that this is better. Now you can either run `python2 gnulib-tool.py` or `python3 gnulib-tool.py`. However this feature needs testing.

Now there is another question. I need to get some information about command-line options. It would be great if you tell me some details:

1) --list, --find, --import, --add-import, --remove-import, --update, --create-testdir, --create-megatestdir, --test, --copy-file, --extract-*. Are they overwriting? i.e. can only one option be set? As I see from source code, there is variable mode which is set equivalent to mode, but I need to be sure.

2) I need all what you can say about other arguments. It would be great if there is something like architecture.odg and functions.odt files, but I'll be very grateful for any information.