fix review-init commmand as gem
fix review-init commmand as gem

__FILE__ and $0 are different when installed as gem

takahashim/review,orangain/review,krororo/review,suzuki/review,kmuto/review,kuad9/review_study,masawada/review,kmuto/review,suzuki/review,masawada/review,takahashim/review,krororo/review,orangain/review,murashitas/review,krororo/review,kmuto/review,kuad9/review_study,murashitas/review