http://issues.liferay.com/browse/LRDOCS-503

http://issues.liferay.com/browse/LRDOCS-503

Added different background color to visually differentiate default properties from examle properties; added horizontal line separators to make it clear which paragraphs describe which properties

Did not add an anchor for each property since multiple properties are often grouped together. Each section has its own anchor and a link from the TOC.

@jhinkey