Support the format of lyrics with time tag in each charactor

[kan8pachi]

The LRC file format contains the lyrics with time tag. The currently supported format is the "time tagged lyrics" where the time tag is placed only in the head of line like:

[00:13.70]すきすきチュッチュ [00:16.65]ラブビーム

In many devices or applications in the world, the "karaoke tagged lyrics" format where time tags may come in the middle of charactors is also widely used. It's like:

[00:13:70]す[00:14:25]き[00:14:46]す[00:14:81]き[00:15:13]チュッ[00:15:78]チュ [00:16:65]ラ[00:16:90]ブ[00:17:15]ビー[00:17:66]ム

We would like to support the latter format.

[kan8pachi]

implemented at #12