LRDOCS-1004 Convert Portlet Prefs tutorial's focus on reader's app
LRDOCS-1004 Reference begin and end portlets for Portlet Prefs tutorial
Merge branch 'portlet-prefs-tutorial' of https://github.com/codyhoag/liferay-docs into pr-162-portlet-prefs
Merge pull request #895 from jhinkey/pr-162-portlet-prefs

QA'd tutorial: portlet prefs