Add complete demonstration game, one move per file.

A normal game will have all moves applied to board.md

It would use commits rather than files to represent each move

This demonstration game allows an automated creation of an example game.

demo/move/0.md

@@ -0,0 +1,8 @@
+```
+| |A|B|C|
++-+-+-+-+
+|3| | | |
+|2| | | |
+|1| | | |
++-+-+-+-+
+```

demo/move/1.md

@@ -0,0 +1,8 @@
+```
+| |A|B|C|
++-+-+-+-+
+|3|X| | |
+|2| | | |
+|1| | | |
++-+-+-+-+
+```

demo/move/2.md

@@ -0,0 +1,8 @@
+```
+| |A|B|C|
++-+-+-+-+
+|3|X| | |
+|2| |O| |
+|1| | | |
++-+-+-+-+
+```

demo/move/3.md

@@ -0,0 +1,8 @@
+```
+| |A|B|C|
++-+-+-+-+
+|3|X| | |
+|2| |O| |
+|1| | |X|
++-+-+-+-+
+```

demo/move/4.md

@@ -0,0 +1,8 @@
+```
+| |A|B|C|
++-+-+-+-+
+|3|X| | |
+|2| |O| |
+|1|O| |X|
++-+-+-+-+
+```

demo/move/5.md

@@ -0,0 +1,8 @@
+```
+| |A|B|C|
++-+-+-+-+
+|3|X| |X|
+|2| |O| |
+|1|O| |X|
++-+-+-+-+
+```

demo/move/6.md

@@ -0,0 +1,8 @@
+```
+| |A|B|C|
++-+-+-+-+
+|3|X|O|X|
+|2| |O| |
+|1|O| |X|
++-+-+-+-+
+```

demo/move/7.md

@@ -0,0 +1,8 @@
+```
+| |A|B|C|
++-+-+-+-+
+|3|X|O|X|
+|2| |O| |
+|1|O|X|X|
++-+-+-+-+
+```

demo/move/8.md

@@ -0,0 +1,8 @@
+```
+| |A|B|C|
++-+-+-+-+
+|3|X|O|X|
+|2| |O|O|
+|1|O|X|X|
++-+-+-+-+
+```

demo/move/9.md

@@ -0,0 +1,8 @@
+```
+| |A|B|C|
++-+-+-+-+
+|3|X|O|X|
+|2|X|O|O|
+|1|O|X|X|
++-+-+-+-+
+```