Fixed compilation errors: removed using namespace from hpp file. This led to pulling cv::ACCESS_MASK to global namespace where conflict with the same name in 'windows.h'

Conflicts:
	apps/traincascade/boost.cpp

apps/traincascade/cascadeclassifier.cpp

@@ -5,6 +5,7 @@
 #include <queue>
 
 using namespace std;
+using namespace cv;
 
 static const char* stageTypes[] = { CC_BOOST };
 static const char* featureTypes[] = { CC_HAAR, CC_LBP, CC_HOG };