o add my bsnes branch

tools/bsnes/reader/reader.hpp

@@ -0,0 +1,15 @@
+class Reader {
+public:
+  enum Type {
+    Unknown,
+    Normal,
+    GZIP,
+    ZIP,
+    JMA,
+  };
+
+  static Type detect(const char *fn, bool inspectheader);
+  virtual unsigned size() = 0;
+  virtual uint8_t* read(unsigned length = 0) = 0;
+  virtual bool ready() { return true; } //can only call read() when ready() returns true
+};