Added a Pixmap item that can fade.

Added a pixmap item that has an alpha member, and thus can be faded.
I just hope that this is not very computer intensive. :)

Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>
Added a nice face out for the background when changing to another state.

This patch added a nice fade-out for the background when changing to
another state. now, I need to do the same for when entering the
Empty state too.

Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>
A better speed for the animations, quarter-of-second.

This seems to be a better speed for the animations.

Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>
Add a initial transition for the Empty State.

I tougth of working today on the profile, but wasted my day doing
animations instead, sigh. Well, now this is working and I think
I can move to the profile per see.

Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>