LRDOCS-746 Updated User Guide's Advanced Portal Operations chapter's on the Audit plugin, configuring Google Analytics with Liferay, Backing Up Liferay, and Using Liferay's Logging System
LRDOCS-746 Finished updating the User Guide's Advanced Portal Operations chapter; updated the section on Upgrading Liferay
Merge pull request #639 from jrao/LRDOCS-746

http://issues.liferay.com/browse/LRDOCS-746