Issues with loader

• AttributeError raised due to wrong attribute name called in message logger.info (from get_input in ts_viz.py)
• graphs don't plot : IndexError (out of bounds) due to dates, x and y not loaded in dataframe in expected order
• further digging into this shows that loaders don't work as expected : dates formatted as datetime64 or similar are not handled by graph, y and x columns are sometimes switched