(1) Minor bug fix in preprocessing.py Lines 193 and 200. (Key "station_info" did not actually exist.)
(2) Enable the preprocessing of individual events. New syntax: "lasif preprocess_data ITERATION_NAME all" for all events, and "lasif preprocess_data ITERATION_NAME EVENT_NAME" to process only the event with EVENT_NAME. This should make it much easier to test the preprocessing without having to work through the whole dataset.