Dataproofer should not have hard dependency on libgconf

[mehmetaergun]

Summary

As a data cleaning tool, Dataproofer should not have hardcoded dependency on libgconf (or gnome, for that matter) so that it can be run from a variety of X environments on linux

Steps to reproduce

1. create virtual machine (debian 8, basic X and dwm as window manager)
2. launch Dataproofer
3. crashes. "error while loading shared libraries: libgconf-2.so.4: cannot open shared object file: No such file or directory"

Expected behavior

Dataproofer should be able to be launched from any X window manager

Thanks :)