trying to implement multiple save and laod but haven't finished
Merge branch 'master' of https://github.com/wulifu2hao/CS3213VisualIDEnew
finish basic of sound playing and file uploading
able to asyncly upload file
storing audio ref to db
load the audio upon completion of uploading
Merge branch 'master' of https://github.com/wulifu2hao/CS3213VisualIDEnew

Conflicts:
	.tmp/styles/main.css
	app/styles/main.scss
finish implementing audio but cannot delete
Merge branch 'master' of https://github.com/wulifu2hao/CS3213VisualIDEnew

Conflicts:
	.tmp/scripts/templates.js
	.tmp/styles/main.css
	app/scripts/main.js
	app/scripts/templates/toolbar.ejs
	app/scripts/views/player.js
improve saving and loading
Merge branch 'master' of https://github.com/wulifu2hao/CS3213VisualIDEnew

Conflicts:
	app/scripts/views/player.js