LRDOCS-949 Insert new Portlet Preferences section
LRDOCS-949 Edited text for 6.1 conversion
LRDOCS-949 Add portlet preferences code to Dev Guide SDK
LRDOCS-949 Added jstl-api and jstl-impl jars to portlet's lib directory. Without these, the portlet does not render.
LRDOCS-949 SF
LRDOCS-949 Add header IDs
Merge pull request #854 from jhinkey/6.1.x-portlet-prefs

6.1.x portlet prefs