Change Mom to SlotMachine

rather large commit, but essentially a simple rename
Rationale in docs and blogs

lib/slot_machine/macro/set_internal_byte.rb

@@ -0,0 +1,16 @@
+module Mom
+  class SetInternalByte < Macro
+    def to_risc(compiler)
+      compiler.builder(compiler.source).build do
+        word! << message[:receiver]
+        integer_reg! << message[:arg2] #VALUE
+        message[:return_value] << integer_reg
+        integer! << message[:arg1] #"index"
+        integer.reduce_int
+        integer_reg.reduce_int
+        word[integer] <= integer_reg
+      end
+      return compiler
+    end
+  end
+end