As per the LL grid, for attachments make llGetObjectDetails() OBJECT_ROT return the avatar's rotation.

This is already the behaviour of OBJECT_POS.
Partially satisfies http://opensimulator.org/mantis/view.php?id=7177
minor: fix wrong indentation in previous commit 0cc3cd
As per the LL grid, for attachments make llGetObjectDetails() OBJECT_VELOCITY return the avatar's velocity and not always Vector3.Zero.

This completes http://opensimulator.org/mantis/view.php?id=7177