*bug* apt-show-versions command not installed by default on ubuntu 12.04 LTS

[shel3over]

command used by the packages plugin

File "/home/hamza/hacks/ajenti/ajenti/plugins/packages/pm_apt.py", line 12, in refresh
out_u = subprocess.check_output(['apt-show-versions', '-u'])
File "/usr/lib/python2.7/subprocess.py", line 537, in check_output
process = Popen(stdout=PIPE, _popenargs, *_kwargs)

[Eugeny]

apt-show-versions is a dependency of our Debian package: https://github.com/Eugeny/ajenti/blob/master/debian/control#L13

[Eugeny]

I've added it to the dev docs though.