o add bsnes

bsnes/lib/ruby/input/directinput.hpp

@@ -0,0 +1,22 @@
+class pInputDI;
+
+class InputDI : public Input {
+public:
+  bool cap(Setting);
+  uintptr_t get(Setting);
+  bool set(Setting, uintptr_t);
+
+  bool acquire();
+  bool unacquire();
+  bool acquired();
+
+  bool poll(int16_t *table);
+  bool init();
+  void term();
+
+  InputDI();
+  ~InputDI();
+
+private:
+  pInputDI &p;
+};