move page types to bottom of setup.txt

so the main configuration comes first
add XML output

just as the JSON output added in e3187cd8a4c46a33d2b622b308e086506a22ff39
update Readme and ext_emconf for v5

* reorder setup.txt to match the Readme
* make separate inclusion jquery.flot.selection.js superfluous
improve display of authors in absence of title-responsibility