Renames test_cdl to test_rnh_cdl
Adds test architecture for ColorDecisionList parsing (which includes ColorDecision, ColorCorrectionRef, MediaRef parsing) and writing
Based on tests for CCC parsing and writing
Makes sure uri detection only triggers on URI, not windows filepath
Makes RnH test case names unique
Adds CDL_ODD test case, adds CDL_FULL written as CCC test case
Adds CDL_ODD as CCC test case
Checks for duplicate child id attributes when appending children
Fixes test broken by unique child id check
Adds CCC as CDL test cases to test_ccc