Remove application layer crc check.

Rearrange of message header to keep non routing information at the end  (preparation for OTA firmware messages)

libraries/MySensors/MyGateway.h

@@ -70,7 +70,6 @@ class MyGateway : public MySensor
 
 	    void serial(const char *fmt, ... );
 	    void serial(MyMessage &msg);
-	    uint8_t validate(MyMessage &message);
 	    void interruptStartInclusion();
 	    void checkButtonTriggeredInclusion();
 	    void setInclusionMode(boolean newMode);