Added the ability to aptpkg.upgrade to use the upgrade opition with apt-get instead of the dist-upgrade method.  Introducing a new argument to the upgrade function, dist-upgrade, which is True by default but can be set to False to use upgrade.
Added the ability to aptpkg.upgrade to use the upgrade opition with apt-get instead of the dist-upgrade method.  Introducing a new argument to the upgrade function, dist-upgrade, which is True by default but can be set to False to use upgrade.

saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt