return list of traces

[jeffreyrosenbluth]

Hopefully that does it but I haven't tested the rayTrace… functions yet.

[jeffreyrosenbluth]

Sounds good

btw you make some good points about appTrace and I'm fine it you want to use it instead of op Trace. It's partly a matter of style and I don't think its that important either.

[byorgey]

@jeffreyrosenbluth , what do you think of my changes? You can see the generated Haddock documentation (with diagrams-haddock images) here: http://www.cis.upenn.edu/~byorgey/diagrams-core/Diagrams-Core-Trace.html .

Other than the SortedList changes which you already saw, I was just making improvements to the documentation.

[jeffreyrosenbluth]

@bergey - you should be able to fix your clipTo algorithm now.