get rid of double separator on initial dir in -t outputs

fix recursion for -t to work on both python 2 and 3

fix minor shebang cosmetics

cleanup version numbering and packaging

update so code works with py2 or py3; update copyright notices

force use of python2 to support code anachronisms

Updated to reflect automatic width detection on *NIX systems.

Removed reference to RCS co command.

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Update copyright.

Added automatic detection of terminal width on *NIX systems.

Converted to CVS form of log extraction.

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Added -R to command list in help summary.

Noted that -D is ignored with -t or -Rdf.

Updated copyright.

Updated copyright and support email.

Documented -D option.

Added -D option to suppress output of dotfiles.

Copyright update.

Changed shell invocation to use /usr/bin/env.

Changed display of sort by extension in several ways: ...

Separator character now appears at the beginning of the extension.
'dot files' (with a leading separator character) are now shown as
having no extension.
Extensions are now enclosed in parens instead of curly braces for
better readability.

Added -e option to Usage command line help display.

Fixed a bug introduced in last version.

Added -e option to top line summary.

Added description of the -e option.

Added option to suppress sorting by extension.

Embedded version number differently in help screen.

Changed definition of TRUE/FALSE booleans to be correct python objects.

Switched from old to new form of string rfind()