Change Mom to SlotMachine

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

lib/slot_machine/macro/operator.rb

@@ -0,0 +1,25 @@
+module Mom
+  class IntOperator < Macro
+    attr_reader :operator
+    def initialize(name , operator)
+      super(name)
+      @operator = operator.value
+    end
+
+    def to_risc(compiler)
+      builder = compiler.builder(compiler.source)
+      integer_tmp = builder.allocate_int
+      operator = @operator # make accessible in block
+      builder.build do
+        integer! << message[:receiver]
+        integer.reduce_int
+        integer_reg! << message[:arg1] #"other"
+        integer_reg.reduce_int
+        integer.op operator , integer_reg
+        integer_tmp[Parfait::Integer.integer_index] << integer
+        message[:return_value] << integer_tmp
+      end
+      return compiler
+    end
+  end
+end