Java API: added class pointer ret type support, CV_EXPORTS_AS(x) support for…

Java API: added class pointer ret type support, CV_EXPORTS_AS(x) support for classes, vector<T> as ret type support, randu/randn params type changed to double

modules/java/src/cpp/features2d_manual.hpp

@@ -33,7 +33,7 @@ public:
 #if 0
     CV_WRAP virtual bool isMaskSupported() const;
 	CV_WRAP virtual void add( const vector<Mat>& descriptors );
-	//CV_WRAP const vector<Mat>& getTrainDescriptors() const;
+	CV_WRAP const vector<Mat>& getTrainDescriptors() const;
 	CV_WRAP virtual void clear();
 	CV_WRAP virtual bool empty() const;
 	CV_WRAP virtual void train();