Takes in a set, list, or tuple scriptnames and returns the symmetric difference (as a list)
		of scriptnames and the stored names.

def SymmetricDifference(self, scriptnames):
		'''Takes in a set, list, or tuple scriptnames and returns the symmetric difference (as a list)
		of scriptnames and the stored names.'''
		scriptnames = set(scriptnames)
		myscripts = set(self.scripts.keys())
		return list(scriptnames.difference(myscripts).union(myscripts.difference(scriptnames)))