Change Ui.

Support multiple senders.

Signed-off-by: Jianmin Zhou <toandrew@infthink.com>
Merge commit '3cfce8e' into aaa

Conflicts:
	receiver/dashboard.css
	receiver/dashboard.js
	receiver/index.html
	sender/src/tv/matchstick/demo/dashboard/DashBoardActivity.java

Signed-off-by: Jianmin Zhou <toandrew@infthink.com>