Minor edit to docstring of find_lyra_events().
Fix small bug in lyra_event_list() where definition of lyra_events
recarray was not finished.
Small bug fixed caused by typo in checking whether end of flare is
caused by an artifact.
Added lytaf_path kwarg to find_lyra_events(), remove_lyra_artifacts(),
and lyra_event_list() so these function set the kwarg of the same
name in extract_combined_lytaf().  Presently, the default value is
defined at top of file as a local directory.  This will be changed
later.