Exposes K2visible to the command line.

def inMicrolensRegion_main(args=None):
    """Exposes K2visible to the command line."""
    import argparse
    parser = argparse.ArgumentParser(
                    description="Check if a celestial coordinate is "
                                "inside the K2C9 microlensing superstamp.")
    parser.add_argument('ra', nargs=1, type=float,
                        help="Right Ascension in decimal degrees (J2000).")
    parser.add_argument('dec', nargs=1, type=float,
                        help="Declination in decimal degrees (J2000).")
    args = parser.parse_args(args)
    if inMicrolensRegion(args.ra[0], args.dec[0]):
        print("Yes! The coordinate is inside the K2C9 superstamp.")
    else:
        print("Sorry, the coordinate is NOT inside the K2C9 superstamp.")