Add legacy configuration files

The gConf2 configuration files for GNOME Terminal are standard
XML files that follow a schema specification probably located at
/usr/share/gconf/schemas/gnome-terminal.schemas on your system.

Using this schema file, it is fairly easy to deduce how you can
customize your GNOME Terminal.  Of course,  this principle is not
restricted only to GNOME Terminal, you can apply it to almost any
GNOME application that uses gConf for storing their configuration.

Feel free to experiment and extend these XML files however you like,
but do be aware that manipulating the gConf database usually involves
replacing currently active settings, so configuration loss and
unexpected behaviour may occur at times.
Update README.md with more relevant project info