shape-outside: polygon() reftests
removed prefixes
added test for polygon + evenodd
converted prior circle test to use polygon instead to test shape-margin extending past the margin box
updated test framework to verify computed styles in addition to inline styles
updated circle + box shape tests to verify computed styles
updated computed shape tests to work with new framework
updated ellipse tests to verify computed styles
updated inset tests to verify computed styles
updated polygon tests to verify computed styles
update shape args tests to verify computed values
added comment about multiple expected results for a couple of tests
added another comment to explaining multiple expected results near the actual assertion
shape-image-021
Merge remote-tracking branch 'upstream/master' into hansmuller/shape-image-021

shape-image-021
shape-image022
Merge remote-tracking branch 'upstream/master' into shape-image-022

shape-image-022
fixed image filename in reference file
fixed a metadata copy and pasteO
closed span per review feedback