Ubuntu package installs additional files that are not cleaned up on package removal

[lebedov]

The dragonfire_1.0.1_amd64.deb package both depends upon several Ubuntu-packaged Python libraries and installs a number of Python packages directly from pypi in /usr/local/. When the dragonfire is uninstalled, the latter are not removed. Moreover, when nltk is installed as one of the dependencies, an nltk_data directory is created in one's home directory that is owned by root. From a package management perspective, it would be preferable to include all files required by dragonfire in the deb file and ensure that no extraneous root-owned files/directories are created outside of the OS directory tree so that the package can be cleanly removed.

[mertyildiran]

@lebedov there is a post-installation entry point for the .deb package, this is that shell script. Although it removes the directory that containes the pre-trained models, I never though about removeing nltk_data directory and the Python package dependencies. So feel free to send a PR for this issue. :blush: