Rails4 compatibility

Acts as list doesn’t support rails4 yet so I changed a bit:

* finder methods were replaced by where (deprecated, http://edgeguides.rubyonrails.org/4_0_release_notes.html#active-record-deprecations)
* removed protectedList tests and attr_ (mass-assignment protection moved out of the model, http://weblog.rubyonrails.org/2012/3/21/strong-parameters/)
* consistent use of ruby1.9 hash syntax


Rails 4 support: :100: