Fix issue 541. Add fixes/adaptations for EXTERNAL_ORIENTATIONS switch.
Fix issue #541 (closed) by copying the head rotations from the ext renderer struct to the decoder (dummy) structure.
Also adjust code to correctly behave under EXTERNAL_ORIENTATIONS switch in various places. Move some variables from hHeadTrackData to the combined orientation structure hCombinedOrientationData.
Edited by Lauros Pajunen