Fixed typos in User Guide chapter 18, Advanced Portal Operation
LRDOCS-562 Re-added section on Liferay's Service Oriented Architecture and accessing Liferay services remotely; updated section for Liferay 6.1 and 6.2
Merge pull request #542 from jrao/LRDOCS-562

http://issues.liferay.com/browse/LRDOCS-562