[#2863] Override the deliverable rows from the budget plugin to show

labor budget spent.

* Added FixedDeliverable#labor_budget_spent
* Added HourlyDeliverable#labor_budget_spent
* Added an _deliverable_summary_row.html.erb with the new method

lib/overhead_fixed_deliverable_patch.rb

@@ -0,0 +1,32 @@
+require_dependency 'deliverable'
+require_dependency 'fixed_deliverable'
+
+module OverheadFixedDeliverablePatch
+  def self.included(base)
+    base.send(:include, InstanceMethods)
+
+    base.class_eval do
+      unloadable
+    end
+  end
+
+  module InstanceMethods
+    # Amount of "billable" money spent on issues.  Similar to +spent+
+    # but only billable time.
+    def labor_budget_spent
+      return 0.0 if self.fixed_cost.nil?
+      return self.fixed_cost unless self.issues.size > 0
+
+      # Get all timelogs assigned
+      time_logs = self.issues.collect(&:time_entries).flatten
+
+      return fixed_cost + time_logs.collect {|time_log|
+        if time_log.billable?
+          time_log.cost
+        else
+          0.0
+        end
+      }.sum
+    end
+  end
+end