Move the math deck files into a named directory for readability.
diff --git a/contrib/ApachePirkCircle.png b/contrib/math_deck/ApachePirkCircle.png
similarity index 100%
rename from contrib/ApachePirkCircle.png
rename to contrib/math_deck/ApachePirkCircle.png
Binary files differ
diff --git a/contrib/ApachePirk_1.png b/contrib/math_deck/ApachePirk_1.png
similarity index 100%
rename from contrib/ApachePirk_1.png
rename to contrib/math_deck/ApachePirk_1.png
Binary files differ
diff --git a/contrib/math_deck.tex b/contrib/math_deck/math_deck.tex
similarity index 100%
rename from contrib/math_deck.tex
rename to contrib/math_deck/math_deck.tex
diff --git a/contrib/pirkImage.png b/contrib/math_deck/pirkImage.png
similarity index 100%
rename from contrib/pirkImage.png
rename to contrib/math_deck/pirkImage.png
Binary files differ
diff --git a/contrib/random_number.png b/contrib/math_deck/random_number.png
similarity index 100%
rename from contrib/random_number.png
rename to contrib/math_deck/random_number.png
Binary files differ