Fix a bug where particle orientation was accessed incorrectly.
Fix a bug where particle orientation was accessed incorrectly.

getOrientation(tag) is ONLY for the python interface to call (or for light use in unit tests).
It has an internal acquire call, so it cannot be used in most of hoomd (additionally, it is SLOW
when compared to direct array accesses)

git-svn-id: b0ce8a66c7afc16299a22e7bdfdcc4c374c2bce9@3965 fa922fa7-2fde-0310-acd8-f43f465a7996

joaander/hoomd-blue,joaander/hoomd-blue,joaander/hoomd-blue,joaander/hoomd-blue,joaander/hoomd-blue,joaander/hoomd-blue