TypingMusicData API implemented.
README modified
Merge branch 'back-theme1'
Merge branch 'front-theme1'

Conflicts:
	Handler/FC/API/TypingMusicData.hs
	yesod-devel/arargs.txt

Typing Record Page Modified with D3.js
Merge branch 'front-theme1'
Bug Fix: next problem is not unfocused properly.
Modify: Time Bar is implemented with D3.js.
Modified: Debug message removed
Modified: Top Page's popup layout
Bug Fix: Popup Thumbnail, Update Music Format
Modify: Score Bar, Time Bar