rafactoring View#el
refactoring use this.$
rename
add Backbone.Model Item
extract AppView#$input
refactoring Model#bind(, , this) <- bindAll()
rename Editor <- Item
add Editor#countUp()
add Backbone.Model Item
add ItemView
refactoring listenTo() <- bind()
defaunt count 0
add ItemView#render()
extract this.$input.val()
add "."
delete comment
delete .item-content > .time