fakelcgen: add generate_transit_lightcurve, add_fakelc_variability fns
fakelcgen: add generate_transit_lightcurve, add_fakelc_variability fns

lgbouma/astrobase,waqasbhatti/astrobase,waqasbhatti/astrobase,waqasbhatti/astrobase,lgbouma/astrobase,lgbouma/astrobase