update sfSimplePagePlugin

Thanks to basos, I updated sfSimplePagePlugin, which is a part of symfony plugins.

The sfSimplePagePlugin allows you to manage like static pages with symfony.
If you are stranger and interested in this plugin, you can read the overview in my page .


This release allow you to use a new component which can be called from another module's template. now this plugin can be used in both sf 1.3 and sf 1.4. If you want to know about this release, please read a  sfSimplePagePlugin page.