Allow Zooshi to have tracks that move along Z.
Allow Zooshi to have tracks that move along Z.

The problem before with tracks that moved along Z was that rotating
towards the Z axis should be done in local space, instead of world
space, which is how the other two axes need to be handled.

Tested on Linux.

Change-Id: I57b718a988e2168f250642d6c82a8d2e3b8e35c5

google/zooshi,google/zooshi,google/zooshi,google/zooshi,google/zooshi