[fix] adapt OTR_TRACKING_REF_VEC* mode to use ne w refQuat, absQuat, trkQuat...

Hi, @stoutjesdijk,

this changes adapts the:

...
        case OTR_TRACKING_REF_VEC:
        case OTR_TRACKING_REF_VEC_LEV:

modes to be compatible with your euler changes.

Without the change all ref_vec* mode test fail for me locally, with the change all the tests succeed again. ( python3 -m pytest -q -n auto tests/renderer/test_renderer.py )

Related to #109