ActiveRecord deprecated finders are broken in 4.2

References: https://github.com/rails/activerecord-deprecated_finders/issues/25

Maintain compatibility for:
* ActiveRecord::Base#find(:all)
* ActiveRecord::Base#find(:first)
* ActiveRecord::Base#find(:last)

I've got a solution and pointed a build at it. Viewable at Gemfile-edge @ https://travis-ci.org/kongregate/activerecord-deprecated_finders/builds/35390651.