refactor code which builds relative url string into its own method.  (issue #87)
add test for buildRelativeUrlString (issue #87)
Improve test for issue #87
Use correct relative url for _facebook and _persona.  (issue #87)
Revert "Use correct relative url for _facebook and _persona.  (issue #87)"

This reverts commit 809c47e0dc73a68a64500e9bdc06bf2eaac1f3c5.
enhance unit test for issue #87
Re-do another fix for issue #87 since the first one caused major issues.