Cedar-backup3

* Packaging changes to allow Debian version to be "normal", not Debian-native.
* Added CedarBackup/release.py to contain "upstream" release number.
* Added -V,--version option to cback script.
* Rewrote parts of Makefile to remove most Debian-specific rules.
* Changed Makefile and setup.py to get version info from release.py.
* The setup.py script now references /usr/bin/env python, not python2.2.
* Debian-related changes will now reside exclusively in debian/changelog.

* Fix bug with the way the default mode is displayed in the help screen.

* Bug fix. Upgrade to Python 2.2.2b1 exposed a flaw in my version-check code.

* Debian packaging cleanup (should have been a Debian-only release 1.5-2).

* Changed cback script to more closely control ownership of logfile.

* Various packaging cleanups.
* Fixed code that reported negative capacity on a full disc.
* Now blank disc ahead of time if it needs to be blanked.
* Moved to Python2.2 for cleaner packaging (True, False, etc.)