The Emerald Window Decorator is a custom window decorator shipped with Compiz 
Fusion that allows for theming and full composite window decorations with the 
use of engines. Emerald allows for all sorts of different configurations and 
layouts of buttons, look, title bars and frames. Emerald Window Decorator is 
completely independent of any desktop, and you specify your own themes to use 
for it. The Decoration plugin must be enabled in order for Emerald Window 
Decorator to function.

Suggested build order:
 1. compiz-bcop
 2. libcompizconfig
 3. compizconfig-backend-kconfig (optional)
 4. compizconfig-backend-gconf (optional)
 5. compizconfig-python
 6. ccsm
 7. simple-ccsm (optional)
 8. compiz-fusion-plugins-main
 9. compiz-fusion-plugins-extra (optional)
10. compiz-fusion-plugins-unsupported (optional)
11. emerald (optional)
12. emerald-themes (optional)
13. fusion-icon (optional)