added route, controller, model, sidebar link, and basic index page for the work info section so that we can render user data

app/models/work_info.rb

@@ -0,0 +1,4 @@
+class WorkInfo < ActiveRecord::Base
+  attr_accessible :DoB, :SSN, :bonuses, :income, :user_id, :years_worked
+  belongs_to :user
+end