Installation and Setup chapter's formatting

These commits correct hidden code snippets and incorrect nesting of lists. I'll transfer changes to 6.2 (master) when the entire chapter's formatting is complete.

@jhinkey Formatting for this chapter is complete through the *Resin 4* section. I'll test and modify the Tomcat section (http://issues.liferay.com/browse/LRDOCS-721), then finish the chapter's formatting.

http://issues.liferay.com/browse/LRDOCS-718