OSX SDK demo app update

src/SDK_ServiceSetup.hpp

@@ -25,6 +25,9 @@
  * LLC. Start here: http://www.zerotier.com/
  */
 
+#include <string>
+
+
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -38,13 +41,15 @@ extern "C" {
     
 #define INTERCEPT_ENABLED   111
 #define INTERCEPT_DISABLED  222
-
+  
+    
 extern std::string homeDir;
     
 #if defined(__ANDROID__)	
     // JNI naming convention: Java_PACKAGENAME_CLASSNAME_METHODNAME
-    /* If you define anything else in this file it *must* follow that convention
-     and any corresponding Java package/classes in your Android project must match this as well */
+    /* If you define anything else in this file it that you wish to expose to your Android 
+     Java application you *must* follow that convention and any corresponding Java package/classes 
+     in your Android project must match this as well */
 	JNIEXPORT void JNICALL Java_ZeroTier_SDK_startOneService(JNIEnv *env, jobject thisObj);
 #else
 	void *startOneService(void *thread_id);