First Commit of MQTT-SN Gateway

Add    new SensorNetwork XBee
Add    a sensor network type in a start message.
Update MQTTSNClient to avoid build warning.
Update WiringPi's functions to my original ones. 
BugFix check msgId before adding waitdTopicId table.
BugFix Process termination procedures
Update print curent time in millseconds.
update move currentDateTime() to linux directory.
Bugfix: blink blue lightiIndicator.
Bugfix: Register returns wrong id.
change a status of the client to Disconnected.
change client status procedure
Update README
BugFix: change Network Disconnect procedures.

Signed-off-by: tomoaki <tomoaki@tomy-tech.com>

MQTTSNPacket/src/MQTTSNPacket.h

@@ -12,6 +12,7 @@
  *
  * Contributors:
  *    Ian Craggs - initial API and implementation and/or initial documentation
+ *    TomoakiiYamaguchi - modify for C++
  *******************************************************************************/
 
 #ifndef MQTTSNPACKET_H_
@@ -35,15 +36,15 @@ enum MQTTSN_connackCodes
 	MQTTSN_RC_ACCEPTED,
 	MQTTSN_RC_REJECTED_CONGESTED,
 	MQTTSN_RC_REJECTED_INVALID_TOPIC_ID,
+	MQTTSN_RC_NOT_SUPPORTED
 };
 
-enum MQTTSN_topicTypes
+typedef enum
 {
 	MQTTSN_TOPIC_TYPE_NORMAL, /* topic id in publish, topic name in subscribe */
 	MQTTSN_TOPIC_TYPE_PREDEFINED,
 	MQTTSN_TOPIC_TYPE_SHORT,
-};
-
+}MQTTSN_topicTypes;
 
 enum MQTTSN_msgTypes
 {
@@ -60,7 +61,7 @@ enum MQTTSN_msgTypes
 
 typedef struct
 {
-	enum MQTTSN_topicTypes type;
+	MQTTSN_topicTypes type;
 	union
 	{
 		unsigned short id;
@@ -73,7 +74,6 @@ typedef struct
 	} data;
 } MQTTSN_topicid;
 
-
 /**
  * Bitfields for the MQTT-SN flags byte.
  */
@@ -126,7 +126,7 @@ int MQTTSNstrlen(MQTTSNString mqttsnstring);
 #include "MQTTSNUnsubscribe.h"
 #include "MQTTSNSearch.h"
 
-char* MQTTSNPacket_name(int ptype);
+const char* MQTTSNPacket_name(int ptype);
 int MQTTSNPacket_len(int length);
 
 int MQTTSNPacket_encode(unsigned char* buf, int length);