Dialog-o-rama!

New styling for Holo dialogs. Now 76% easier for apps to create
dialog-based layouts! (Less tricky padding and margin rules)

Cancelable AlertDialogs now are canceled when the user touches
outside.

Dialogs in landscape mode will try not to fill the width of the
screen.

Change-Id: I621b5a19780883ee703a8492510451b480a0b8cc