remiprev/her — pull request #151 by stevschmid (2013-07-11 13:19:30+00:00)
Title: Add association#find

Adds #find for associations!

Example:
```ruby
class User
include Her::Model
has_many :comments
end

user = User.find(1)
user.comments.find(3) # Fetched via GET "/users/1/comments/3
```