Issues/3922 fix pending rspec tests

Fix pending rspecs for works and skins, and add some to test the pseud model. Down from 88 pending tests to 76.

https://code.google.com/p/otwarchive/issues/detail?id=3922
@zz9pzza @sarken thanks! I'd still rather have separate small tests for each thing we're actually testing than one large block of CSS, but testing more complicated uses of box-shadow and border-radius seems fine.

I kind of want to make them separate tests, though (since generalizing to say all CSS3 properties will work might not be accurate.)