Added testing ability

For the full details, see patches/README.md :-)

patches/gollum.sh

@@ -0,0 +1,24 @@
+#!/bin/bash
+#
+#     "It isn't fair, my precious, is it,
+#      to ask us what it's got in it's
+#      nassty little pocketsess?"
+#             Gollum, The Hobbit, or There and Back Again 
+#
+
+cd $(dirname $(which $0))
+f=$(basename ../exercises/$1*.zig .zig 2> /dev/null)
+b=../exercises/$f.zig
+a=../answers/$f.zig
+p=$f.patch
+
+printf "\tf: '$f'\n\tb: '$b'\n\ta: '$a'\n"
+
+if [[ ! -f $b ]]; then echo "We hates it!"; exit 1; fi
+if [[ ! -a $a ]]; then echo "Where is it? Where is the answer, precious?"; exit; fi
+
+echo Hisssss!
+
+diff $b $a > $p
+
+cat $p