Compile Aerodyn 15.04 source files in FAST

Dear Anton,

Ah, I forgot to tell you that you need to use the updated NWTC Library with AeroDyn v15.04: github.com/NWTC/NWTC_Library (the updated Library has added FUNCTION Rad2M180to180Deg.)

I would not expect the updated code to run much slower. Perhaps you’re compiling in debug mode?

Best regards,