[#4182] Require redmine_overhead to define billable time entries.

app/helpers/deliverables_helper.rb

@@ -0,0 +1,3 @@
+# Defined for redmine_overhead compatibility
+module DeliverablesHelper
+end

init.rb

@@ -18,7 +18,8 @@ Redmine::Plugin.register :redmine_contracts do
 
   requires_redmine :version_or_higher => '0.9.0'
   requires_redmine_plugin :redmine_rate, :version_or_higher => '0.1.0'
-
+  requires_redmine_plugin :redmine_overhead, :version_or_higher => '0.1.0'
+  
   project_module :contracts do
     permission(:manage_budget, {
                  :contracts => [:index, :new, :create, :show, :edit, :update, :destroy],