Added XSLT files for viewing test reference data.

Added XSLT files for viewing test reference data.

These make it much easier to check the test reference data.
It's simpler to maintain these XSLT transformations together with easily
machine-processable XML files instead of trying to make the XML files
easy to read.  Required regenerating the XML files to add references to
the style sheets.  common-referencedata.xsl is duplicated in each
directory to make it work on more browser (at least Firefox).

Change-Id: I67de308a50831371d7c2581e2b013901006387e4