Single script that creates profile and can toggle its scheme

This pull request includes a script (in python) that creates a unique gnome-terminal profile named 'Solarized' for both background schemes.

user can install **dark** scheme using:

    ./solarize dark

or  **light** scheme using:

    ./solarize light

and will toggle between dark and light schemes if called without arguments:

    ./solarize

It creates the profile if doesn't exists the first time, and also sets it as default theme for new gnome-terminal windows