MISQ: edition superscript, proceedings publisher

Set the ordinal suffix of edition-numbers to superscript and add the publisher to proceedings.
this should really be done as a group delimiter for robustness (i.e. to prevent weird formatting in case there's no publisher place). i.e. 
```
<group delimiter=": ">
  <text variable="publisher-place"/>
  <text variable="publisher"/>
</group>
```