Message format defined:
	STX | MSGID | LENGTH | payload | ETX
	
Implemented Arduino (sending side) and Android (receiving)
+Added many comments to the code and JavaDoc
+Added Apache 2.0 license
+Created LoggerThread
+Added timestamp features
+Arduino thread errors are now handled by the "error recovery" in
	BTManagerThread


TODO: Define log format
		write messages to Log file
TODO: define error recovery 
		do it in BTManagerThread
TODO: check how the efficiency of the APP affects the elapsed time while
		reading from the socket
Received messages are written to SD file
Issue: email is apparently sent, but does not reach destination

Solved some issues regarding "unable to unregisterReceiver", but may
still appear