use blank? instead of nil? refs #88
use blank? instead of nil? refs #88

codefirst/AsakusaSatellite,mallowlabs/AsakusaSatellite,mallowlabs/AsakusaSatellite,codefirst/AsakusaSatellite,mallowlabs/AsakusaSatellite,codefirst/AsakusaSatellite,codefirst/AsakusaSatellite