Parametrise test arguments - each set of values runs as a spearate test.

--HG--
branch : 1.8
Parametrise test args.

--HG--
branch : 1.8
Parametrise axis scaling, test axis constructor.

--HG--
branch : 1.8
Remove commented out code.

--HG--
branch : 1.8
When tests are running all XML objects are lxml and can be validated directly.

--HG--
branch : 1.8
Add validation of generated XML.

--HG--
branch : 1.8