FIX #17 update version information, bump to 0.18.1

Author: nmtoblum

src/main.cpp

@@ -32,7 +32,7 @@
 #define DEFAULT_ERROR_RETRY_INTERVAL 30			// Default interval to try again after errors
 #define TOKEN_REFRESH_TIMEOUT 60	 			// Number of seconds until expiration before token gets refreshed
 #define CONTEXT_FILE "/context.json"			// Filename of the context file
-#define VERSION "0.17.0"						// Version of the software
+#define VERSION "0.18.1"						// Version of the software
 
 #define DBG_PRINT(x) Serial.print(x)
 #define DBG_PRINTLN(x) Serial.println(x)