[#4180] Move the CSS and JS includes to the layout hooks.

lib/redmine_contracts/hooks/view_layouts_base_html_head_hook.rb

@@ -0,0 +1,20 @@
+module RedmineContracts
+  module Hooks
+    class ViewLayoutsBaseHtmlHeadHook < Redmine::Hook::ViewListener
+      def view_layouts_base_html_head(context={})
+        if context[:controller] && (
+                                    context[:controller].is_a?(ContractsController) ||
+                                    context[:controller].is_a?(DeliverablesController)
+                                    )
+          return stylesheet_link_tag("redmine_contracts", :plugin => "redmine_contracts", :media => "screen") +
+
+            javascript_include_tag('jquery-1.4.2.min.js', :plugin => 'redmine_contracts') +
+            javascript_include_tag('contracts.js', :plugin => 'redmine_contracts')
+
+        else
+          return ''
+        end
+      end
+    end
+  end
+end