Delete the RAWToPIL and PILToRAW function from the function.py, and use the same function from the MDmisc.imageprocessing library

Recode the 'NIST.traditional.NIST.load_auto()' function to copy all fields, and not to copy all data contained in the NIST object.

Add the function NIST.traditional.NIST.is_binary(), checking if a particular field is stored as binary data or not