Merge pull request #51 from gguowei/wp-1224

WP-1224: Fix media file metadata retrieving
WP-1233: updated libjninode.so
Merge pull request #52 from gguowei/wp-1233

WP-1233: updated libjninode.so
WP-1224: Handling MP3 with both MediaMetadataRetriever and JID3