Dev jony

added wall:

spec/factories/walls.rb

spec/models/wall_spec.rb

db/migrate/20141003011707_create_walls.rb

app/models/wall.rb

I understand its just a name! But my point is with the exercise of explaining it from the user perspective is:

- A user has a wall.
- A user writes posts to the wall, which is content.
- So a wall has many posts.
- So content does not really exist as an object itself, but it is the collection of posts that make the wall.

Can you see what I mean?

As a suggestion I would start to define the post class first. because a wall is dependent on it. Also as a suggestion the most simple implementation of a post would be: A title as a string, and a description as text(text is a longer type of string), first example here: http://guides.rubyonrails.org/migrations.html  make another Pull request for that with the instructions I gave you on the last email and no need to worry about this one for now! We will continue after!