[css3-ui] basic image cursor tests updated

Hello,

I have changed tests  cursor-image-001 to cursor-image-009, and
cursor-image-005-nfs, based on review comments.

The following general changes

- meta utf8
- meta flags image, and where appropriate svg and animated
- cursor target area specified in px not em, div not p
- no more nice green grass for the sheep, dry desert instead
 (no green==pass risk)
- assertions now specific to each test, removed from readable text
- pass criteria tightened up

cursor-image-005-nfs now tests for spec behaviour on unsized images
and has additional spec text link (to css3-images)

cursor-image-009 is now explicitly a test for the required fallback

In addition I added three more tests, same as the above except testing
for:

010    GIF
011    GIF with transparency
012    JPEG in JFIF container (ie what everyone means by "JPEG image")

-- 
Best regards,
 Chris Lilley, Technical Director, W3C Interaction Domain