add models/todo
add collections/todo
add views/app
add views/layout/main
add views/layout/header
add views/layout/footer
add todo/todo-collection-view
add todo/todo-view; fetch todos in TodoCollectionView
pass todos collection to inner view more betterly
update README
refactor layout/header a little bit
add keypress listener to create a Todo
formatting; HeaderView
formatting; HeaderView
add click listener to delete a Todo
add click listener to toggle status of a Todo
add dblclick listener to activate Todo edit mode
add keypress listener to exit Todo edit mode onEnter
add blur listener as an alternate to exit Todo edting mode
delete a Todo if title is editing to be an empty string