Add tests for MOVE* words

tests/all/test_move.fs

@@ -0,0 +1,13 @@
+42 C, 43 C, 44 C,
+H@ 3 - H@ 3 MOVE
+H@ C@ 42 #eq H@ 1+ C@ 43 #eq H@ 2+ C@ 44 #eq
+H@ H@ 1+ 3 MOVE ( demonstrate MOVE's problem )
+H@ 1+ C@ 42 #eq H@ 2+ C@ 42 #eq H@ 3 + C@ 42 #eq
+H@ 3 - H@ 3 MOVE
+H@ H@ 1+ 3 MOVE- ( see? better )
+H@ 1+ C@ 42 #eq H@ 2+ C@ 43 #eq H@ 3 + C@ 44 #eq
+
+H@ ( ref )
+H@ 3 - 3 MOVE,
+( ref ) H@ 3 - #eq
+H@ 3 - C@ 42 #eq H@ 2- C@ 43 #eq H@ 1- C@ 44 #eq