Mailprocessing

- Improved robustness for erroneously encoded headers when running Python
3.x.
- Fixed problem with logging to stdout when running Python 3.x.

- Improved robustness for erroneously encoded headers.
- Made it possible to log non-ASCII characters from the RC file.

- Added support for Python 3.0.
- Dropped support for Python 2.4.
- Improved support for character handling. Unicode strings are now
used for all text handling.
- Improved handling of headers spanning several lines.
- Improved documentation style sheet.

- The maildir base directory now defaults to the current working
directory.
- Improved error handling for missing configuration file.
- Improved error handling for badly encoded mail headers.
- Made the program exit with an error code and print an error
message to stderr when a fatal error has occurred.
- Minor improvements of the documentation.

- Added feature that (if enabled) reloads the rc file when it has
been modified.
- Improved documentation and examples.
- Moving and copying of mail now preserve mail flags. Contributed by
Daniele Pizzolli.

- Made handling of mail headers more robust so that badly encoded
headers don't produce a crash.
- Improved documentation.
- Made the mailing list header "Mailing-List" recognized in the
from_mailing_list method of the Mail class.