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Copyright 2013 Pixar
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that do not have that type of data
- fix some regression shapes that had "empty" uv values
(including some minor topo surgery that luckily appears to not break
regression baselines)
rules are set to "none" (both in Catmark & Loop)
* Amended shape_utils to always set a default boundary interp. rule
even when no tag was read (ie. don't default to "none")
* Added a regression test for the "dart" shape to test both
"edge only" and "edge corner" boundary interp. rules.
Closes#2.
