tests for examples in the spec. fixes #112, #414, #415, #416, #417, #418
removing tests not yet ready for submission
removed svg, used clip-path instead
fixed 1px error in ref file
removed prefixes
addressing review comment https://github.com/w3c/csswg-test/pull/434#discussion_r9400348
fixed test per review comment https://github.com/w3c/csswg-test/pull/434#discussion_r10143621.  turns out I also refactored the class and id names here and there were no red elements so I fixed that, too
removed prefixes
Merge pull request #508 from rhauck/pr-434-branch-copy

Pr 434 branch copy