Lyra level 3

Hi @gunner272.  Here is a little fix for ensuring that the LYRALightCurve object correctly interprets the times in the level 3 fits files.  The level 3 fits files have times in minutes, not seconds like in the standard level 2 fits.  This means that the LYRALightCurve object was interpretting the level 3 measurements as every second instead of every minute.  This change fixes that.