added reference to original and separated unused csv files out

ccs_multi_dx_tool_2015.csv

data_input_path/mimic/ADMISSIONS.csv

data_input_path/mimic/D_ICD_PROCEDURES.csv

data_input_path/mimic/D_ITEMS.csv

data_input_path/mimic/D_LABITEMS.csv

data_input_path/mimic/ICUSTAYS.csv

data_input_path/mimic/INPUTEVENTS_CV.csv

data_input_path/mimic/INPUTEVENTS_MV.csv

data_input_path/mimic/PATIENTS.csv

data_input_path/mimic/PRESCRIPTIONS.csv

data_input_path/mimic/PROCEDURES_ICD.csv

data_input_path/mimic/SERVICES.csv

data_input_path/mimic/TRANSFERS.csv

data_input_path/mimic/unused/CALLOUT.csv

data_input_path/mimic/unused/CAREGIVERS.csv

data_input_path/mimic/unused/CHARTEVENTS.csv

data_input_path/mimic/unused/CPTEVENTS.csv

data_input_path/mimic/unused/DATETIMEEVENTS.csv

data_input_path/mimic/unused/DIAGNOSES_ICD.csv

data_input_path/mimic/unused/DRGCODES.csv