For a novice, the steps required to can install the bzr plugin push-and-update are not clear.
The plugin is described here in the bzr documentation, and there is another documentation page that explains how to install plugins
But there is no clear guide to installation.
find the plugin directory
The libraries (on ubuntu) are:
$HOME/.bazaar/plugins'
/usr/lib/python2.7/dist-packages/bzrlib/plugins'
* Install from launchpadInstall from launchpad, renaming the directory to avoid errors.