On branch strong-params

Your branch is behind 'origin/strong-params' by 1 commit, and can be fast-forwarded.

I'll pull to catch up after this commit
Change code to whitelist params
Remove attr_accessible lines
Add strong_params to Gemfile, since this branch is still on Rails 3
Mixin to ActiveRecord::Base ActiveModel::ForbiddenAttributesProtection
Use an initializer for the mixin

app/models/retirement.rb

@@ -1,4 +1,3 @@
 class Retirement < ActiveRecord::Base
-  attr_accessible :employee_contrib, :employer_contrib, :total
   belongs_to :user
 end