in-text citation fix; reverted one previous change

In-text citations of "et al." papers will no longer provide the given name of the primary author if another author already in the bibliography shares that surname. 
changed to:
"disambiguate-add-givenname="false">"
however <disambiguate-add-year-suffix="true"> and <disambiguate-add-names="true"> remain the same, and work well.

also the hanging-indent for the bibliography has been changed back to false, as it only applies to authors and not the date/following lines. (this is a style change for the future....)