fix media-type and opf:role in OPF file
fix media-type and opf:role in OPF file

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