[Arm-netbook] tablet re-re-design

[Luke Kenneth Casson Leighton]

ok so i tried the new layout... _after_ joining all the tracks up of
course... and unnnfortunately the cpu card slot is so far down that
the battery is squashed badly at the bottom (long) end and is far too
small.

so... aaaaaaagh!  i have to begin again :)  next attempt will be to
turn the cpu card round 180 degrees (so it comes out on the right).

ah all good fun...