Add a tool that will generate examples using all matrix and hash options

This tool will go through the examples directory and generate an image
for all *.in files using every hash and matrix option.

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>

tools/genexamples.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+set -eo pipefail
+here="$(dirname "$(realpath "$0")")"
+
+hashes=(md5 sha1 sha224 sha256 sha384 sha512)
+matrices=(nibble randomart)
+
+cd "$here/.."
+
+find "examples" -type f -name '*.in' | \
+while read infile; do
+    for hash in "${hashes[@]}"; do
+        for matrix in "${matrices[@]}"; do
+            outfile="examples/$(basename -s .in "$infile")-$hash-$matrix.svg"
+            echo "Generating $outfile"
+            python3 -m colorhash "$infile" --out "$outfile" --hash "$hash" --matrix "$matrix"
+        done
+    done
+done