Articles with mixed content

[KitWallace]

Many articles mix subject matter which would be better relocated:

eg
https://en.wikibooks.org/wiki/XQuery/HelloWorld

Starts with a simple bit of XQuery which includes executable code.

The final part is about how to execute code in an Exist environment, REST and URL -rewiting

I propose relocating this code to a section on exist to leave these basic articles to be about XQuery the language.

[KitWallace]

Stuff on the environment has been moved to a new section Executing XQuery