Added i18n strings for terms for sign in/sign out.
Extended Sign In/Sign Out to mobile view. Added Spanish examples. Added GC Web Usability Intranet theme examples.
Added Sign In/Sign Out examples to the WET and Base themes.
Merge pull request #1688 from pjackson28/signinout-mobile

Extended Sign In/Sign Out to mobile view as well as to the GCWU Intranet, WET and Base themes