D-6

v-2.0.1
---
1. "Repeat" button

    ==> done
D-6

v-2.0.2
---
1. "Play" <--> "Pause"

    ==> done
D-6

v-2.0.3
---
1. Reafactor => UI

    ==> done
D-6

v-2.1
---
1. Modify: UIs => list scroll

    ==> done
Merge branch 'D-6_Ajax_return-html'