On branch strong-params

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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/analytics.rb

@@ -1,6 +1,4 @@
 class Analytics < ActiveRecord::Base
-  attr_accessible :ip_address, :referrer, :user_agent
-
   scope :hits_by_ip, ->(ip,col="*") { select("#{col}").where(:ip_address => ip).order("id DESC")}
 
   def self.count_by_col(col)