Add a conj function for real values, so that more general code can be written.
Add a conj function for real values, so that more general code can be written.

cusplibrary/cusplibrary,cusplibrary/cusplibrary,cusplibrary/cusplibrary,cusplibrary/cusplibrary,sdalton1/cusplibrary,sdalton1/cusplibrary,sdalton1/cusplibrary,sdalton1/cusplibrary