Finished up whilerow. Added hearder tag.

Global.cpp

@@ -87,5 +87,16 @@ namespace jet {
 	throw coreutils::Exception("requested session is not available in variable.");
       return sessions[splitName[0]]->getColumnValue(splitName[1]);
    }
-      
+
+   void Global::outputHeaders() {
+      if(headers.size() > 0) {	
+	 for(std::map<coreutils::MString, coreutils::MString>::iterator header = headers.begin();
+	     header != headers.end();
+	     ++header) {
+	    std::cout << header->first << ": " << header->second << std::endl;
+	 }
+	 std::cout << std::endl;
+      }   
+   }
+   
 }