added DD RFE mode to list of modes that are I-only
added HDR mode to list of I only modes
use DEFAULT_SAMPLE_TYPE instead of new property
Merge pull request #3 from wardi/fix_dd_axis

use DEFAULT_SAMPLE_TYPE instead of new property
Merge pull request #72 from mfarhan12/fix_dd_axis

added DD RFE mode to list of modes that are I-only