Changed 'recvAll' return type from std::string to char pointer, and created a non-blocking version of the function

includes/sock.hpp

@@ -33,9 +33,15 @@ public:
 
 	/* Method to send data in 'to_send' through the 'other_socket' socket */
 	void sendAll(std::string to_send);
+	
+	/* Same as method above, with buffer and buffer size */
+	void sendAll(char* buffer, int size);
 
 	/* Method to receive data sent to the 'other_socket' socket */
-	std::string recvAll();
+	char* recvAll();
+
+	/* Non-blocking receive method - calls the method above after polling for data */
+	char* recvAllNB();
 
 	/* Returns socket identifier */
 	int getSockFD();