delete some files to make structure  of static page files clear
[#1591]extract the css and html from static page [calendar.css and planners/index.html.erb]
	修改：      app/assets/stylesheets/application.css.scss
	修改：      app/assets/stylesheets/planner.css.scss
	新文件：    app/assets/stylesheets/planner/calendar.css
	删除：      app/assets/stylesheets/planner/mod.css
	修改：      app/views/planners/index.html.erb
	修改：      public/static Pages/docs/html/static.html