[sugar] sugar shell refactoring

[Tomeu Vizoso]

Hi all,

for the last months we have received valuable feedback about the Sugar
user interface. After some discussion, some changes have been
proposed. Eben explains them in the following links:

http://wiki.laptop.org/go/Designs

We won't be able to implement all this for Update.2, but will try  to
get in the most important and urgent features.

http://wiki.laptop.org/go/SugarShellRefactoring

Please give you feedback in this mailing list. The wiki will be
updated after we reach some consensus.

Thanks,

Tomeu