compatible with regular files (in particular it now supports the context
management protocol).

imp.reload().  Patch by Thomas Kluyver.

Patch by Serhiy Storchaka.

There are other issues left, but these were basics (e.g. keys().sort()).

Sjoerd writes:

This version of freeze creates one file per Python module, instead of
one humongous file for all Python modules.
bkfile: new module to used to write files with backups.  No new file
is produced if the new contents is identical to the old.
New option "-x excluded-module" for modulefinder test program.
New option "-i filename" for freeze main program to include a list of
options in place of the -i option.