Debian package 0.2-2

Fixes https://github.com/zerovm/zpm/issues/157.

Includes the latest bugfixes to the zpm code, as well the addition of the `python-swiftclient` dependency in the packaging. (`python-swiftclient` was a dep as far as the python code was concerned, but not in the package; this was a bug.)

This is a derivative of https://github.com/zerovm/zpm/pull/160; it should land first for a clean diff.