fade other panels when opening one, instead of set hidden instantly
Merge branch 'master' of https://github.com/yueinteractive/readingproject-yue

Conflicts:
	css/style.css
	js/panel.js
change panel border-radius size in pixels
Merge branch 'master' of https://github.com/yueinteractive/readingproject-yue

Conflicts:
	.DS_Store
	js/panel.js
added circle_btn arrow rotation transition in CSS