LRDOCS-898: Remove generic OAuth content from OpenSocial and create new section
LRDOCS-898: Add section for OAuth
LRDOCS-898: Add missing utility applications into the chapter Summary
Merge branch 'master' into oauth-portlet-ug
Merge branch 'master' into pr-985

Conflicts:
	userGuide/en/chapters/09-social-networking.markdown
Wordsmithing.