-* Use distribution combinators[1] to get rid of the orphan instance
- warnings.
-
* Update show definitions.
-[1] http://stackoverflow.com/questions/4001861/how-small-should-i-make-make-modules-in-haskell
+* Document everything.
+
+* Test whether or not dropping the guards from the Tetrahedron.volume
+ function speeds things up (and still produces a correct result).
+
+* Re-run hpc and remove any dead code.