Continued item authoring view
Rationalised CSS/JS after recent changes
Fixed typo in MAD01-SRinCO-demo.xml
Removed broken MathML space munging in XSLT.

I don't think this is a problem now that we're using
MathJax, but can come up with a replacement if there does
seem to be an issue.
Minor tidy to rendering examples & docs
Continued with item/test debug rendering...

* Added test debugging
* Refactored XSLT to accommodate this better
* Some more general refactoring on the way