-* Re-enable the exact volume tests. Should probably occur after I
- figure out why each tetrahedron doesn't have 1/24th the volume of
- the cube.
+* Use distribution combinators[1] to get rid of the orphan instance
+ warnings.
-* Add exact area tests for the remaining tetrahedron.
+* Update show definitions.
-* Add the rest of the edge incidence tests.
+[1] http://stackoverflow.com/questions/4001861/how-small-should-i-make-make-modules-in-haskell