LRDOCS-1401 Finished section on customized search filtering; added instructions on creating a JSP hook for the Search portlet to demonstrate customized search filtering
LRDOCS-1401 Added some detail to search and indexing section intro
LRDOCS-1401 Expanded Enabling Search and Indexing tutorial with info on using SearchEngineUtil.search and TermQuery, TermRangeQuery, and BooleanQuery. Added definition of terms sections and related topics section to both search and indexing tutorials