Adds engines 2.1.0 plugin.

git-svn-id: http://redmine.rubyforge.org/svn/trunk@1654 e93f8b46-1217-0410-a6f0-8f06a7374b81

vendor/plugins/engines/generators/plugin_migration/templates/plugin_migration.erb

@@ -0,0 +1,13 @@
+class <%= class_name %> < ActiveRecord::Migration
+  def self.up
+  <%- plugins.each do |plugin| -%>
+    Engines.plugins["<%= plugin.name %>"].migrate(<%= new_versions[plugin.name] %>)
+  <%- end -%>
+  end
+
+  def self.down
+  <%- plugins.each do |plugin| -%>
+    Engines.plugins["<%= plugin.name %>"].migrate(<%= current_versions[plugin.name] %>)
+  <%- end -%>
+  end
+end