add Logo
add Logo
add logo
add model of brief-comments
finish the model of brief comments
add the view of advanced search
Merge branch 'master' of https://github.com/wwzyhao/PaperBook-MySQL

Conflicts:
	app/views/search/index.ejs
	public/css/style.css
	public/less/style.less
deal with sm conflict
Merge pull request #6 from wwzyhao/master

merge wwzyhao logo, and brief comment