remove behavior for placeholder prefix values, add error message for missing prefix

..._asymmetricalrotation_7statesfull_animated/properties.txt

...tion_7statesfull_animated_chaoillustration/properties.txt

...e_symmetricalrotation_7statesfull_animated/properties.txt

...tion_7statesfull_animated_chaoillustration/properties.txt

Basic templates/example/properties.txt

Basic templates/example_animated/properties.txt

Basic templates/example_asymmetricalrotation/properties.txt

...ates/example_asymmetricalrotation_animated/properties.txt

Basic templates/example_symmetricalrotation/properties.txt

...ample_symmetricalrotation_2states_animated/properties.txt

...ample_symmetricalrotation_7states_animated/properties.txt

...lates/example_symmetricalrotation_animated/properties.txt

src/main.c