Method new on collection does not work

[loicboutet]

Example :
You have a Post model which has many Comment.

You cannot do in reactive-record
post.comments.new(title: "hello world")
So you have to do
post.comments << Comment.new(title: "hello world")

This patch seem to fix the problem :

module ReactiveRecord
  class Collection
    def new(*args)
      self << klass.new(*args)
    end
  end
end