Added pyramids to the implementation report and enabled tests

Also refined the implementation report for perimeter_of, area_of, and length_of
and incorporated new names for unary functions with _of

extern/glow-extras

-Subproject commit d7a828958f440dae80f00f0e26c55c96e891ec5d
+Subproject commit 2d5d78114dc562c614373022e638d46c47a4a617