Add application icons

server/core/response.go

server/middleware/session.go

server/routes.go

server/static/bin.go

server/static/bin/favicon.png

server/static/bin/touch-icon-ipad-retina.png

server/static/bin/touch-icon-ipad.png

server/static/bin/touch-icon-iphone-retina.png

server/static/bin/touch-icon-iphone.png

server/template/common.go

server/template/html/common/layout.html

server/ui/controller/static.go