Implemented more of the Deliverable calculations

* Added deliverable.score
* Added fixed_deliverable.score as 0
* Added deliverable.budget_ratio

  #1136

app/models/deliverable.rb

@@ -7,7 +7,7 @@ class Deliverable < ActiveRecord::Base
 
   # TODO: mocked
   def score
-    0
+    return self.progress - self.budget_ratio
   end
   
   # TODO: mocked
@@ -29,6 +29,10 @@ class Deliverable < ActiveRecord::Base
     return (balance / total).round
   end
   
+  def budget_ratio
+    return ((self.spent / self.budget) * 100).round
+  end
+  
   #
   # These attributes can take a Dollar amount or a %
   #

app/models/fixed_deliverable.rb

@@ -1,3 +1,8 @@
 class FixedDeliverable < Deliverable
   unloadable
+  
+  # Fixed rate bids should always have a budget score of 0. This is because the budget is managed by the contractor.
+  def score
+    0
+  end
 end