Add path to common directory into user-story-final

Add path to common directory into user-story-final.
For img and json resources.
Change FileName to launch user-story final

Change index.html to movie_board.html
Fixe EvalException when launch user-story-final.

When launch movieBoard, there is an EvalException("Filters must be a
one-argument function).
It's declaration of asStars function in poster.dart.
Fixe to build correctly movieBoard

Old references to index.html
User-story-3 finished
Update path of user-story markdown documentation

In readme.md. Link for next step in each user-story documentation is
already OK.
Revert "Update path of user-story markdown documentation"

This reverts commit 1109394e2c6961ca4a820b2937996d58a09c052b.
Merge remote-tracking branch 'upstream/master'
Fixes path to step link in readme.md

Fixe path to user-story markdown docs. Fixe name of user-stoyr-final
directory.
update doc for user-story1
Added clarification to user-story-1-1 and changed the complement to 10 as written in the user-story
Used @reflectable instead of @observable which better as these attributes do not need to be observable (no change occurs). @observable will be used for favorite attribute in another user-story.
Started user-story 2
Merge pull request #6 from stefrem/Corrections

Corrections