new theme

[Marco Martin]

Hi all,

I've just merged the changes i was doing to the default theme, so since today 
it should look a bit different.

the biggest thing is that the default background thing is not transaprent 
anymore, all look quite less glassy, that is the direction we wanted for the 
theme.

the activity screen being mostly opaque is something that perhaps is a bit 
much, that's why i did it now so there is plenty of time to get back to the 
old graphics.
but please give it a try and leave it for some days before judging it ;)

no screenshots yet since i want it to be directly tried on the tablet, because 
looks completely different there

Cheers,
Marco Martin