Skip copyright notice in all source files

It's not really necessary to have this in the header of each file. One
file in the root directory ought to be enough. We can't put that in XIB
files anyway, and updating the year is a bit of a hassle when there's a
lot of files that has to be updated.

Signed-off-by: Marcus Karlsson <mk@acc.umu.se>
Bump copyright year to 2013

Signed-off-by: Marcus Karlsson <mk@acc.umu.se>
Enable auto layout

Using auto layout simplifies managing the user interface. We're not
using it right now, but it looks like it works so let's enable it.

Signed-off-by: Marcus Karlsson <mk@acc.umu.se>