sez11a/liferay-docs — pull request #317 by jrao (2012-09-25 15:40:58+00:00)
Title: http://issues.liferay.com/browse/LRDOCS-302

http://issues.liferay.com/browse/LRDOCS-302

added information from Julio's wiki article (http://www.liferay.com/community/wiki/-/wiki/Main/Plugin+to+extend+a+plugin) to Dev Guide

@jhinkey
@juliocamarero