GBRT Train and Test Phase added

utils/xgboost_string.h

@@ -0,0 +1,31 @@
+#ifndef _XGBOOST_STRING_H_
+#define _XGBOOST_STRING_H_
+#include<vector>
+#include<sstream>
+
+namespace xgboost{
+	namespace utils{
+		class StringProcessing{
+
+		public:
+			static std::vector<std::string> &split(const std::string &s, char delim, std::vector<std::string> &elems) {
+				std::stringstream ss(s);
+				std::string item;
+				while (std::getline(ss, item, delim)) {
+					elems.push_back(item);
+				}
+				return elems;
+			}
+
+
+			static std::vector<std::string> split(const std::string &s, char delim) {
+				std::vector<std::string> elems;
+				split(s, delim, elems);
+				return elems;
+			}
+
+		};
+	}
+}
+
+#endif