New color palettes to fix colors in gnome terminal. Madea backup of old palettes in the colors/.palette*_backup files

Signed-off-by: Anthony Ruhier <anthony.ruhier@gmail.com>
Profiles standardisation

A profile can be added simply by creating a folder in the colors dir,
and has to contain at least these 5 files:
    palette_dconf: palette for dconf
    palette_gconf: palette for dconf
    bd_color, bg_color, fg_color: colors used by gnome-terminal
Then it will be listed automagically by the install.sh script
Adapt help to the new colors modifications
Remove unnecessary files