completed iris event handler framework

src/IRbabyIRIS.h

@@ -37,6 +37,12 @@
 #define EVENT_NAME_CONNECT           "__connect"
 #define EVENT_HEART_BEAT_REQ         "__hb_request"
 
+typedef int (*eventHandler)(const char* payload, int length);
+typedef struct {
+    const char* event_name;
+    eventHandler handler;
+} event_handler_t;
+
 int getIRISKitVersion(char *buffer, int buffer_size);
 
 int getDeviceID(char* buffer, int buffer_size);