Ignore any '\r' characters received from Serial Monitor

This allows the Serial Monitor to send NL or CR/NL at end of each line.  A newline ('\n') must be at the end to terminate reading from the Serial Monitor, but any preceeding carriage returns are stripped out.

src/Utils.cpp

@@ -55,10 +55,11 @@ char *Utils::readSerial(char *c, int max){
       return(c);           // return updated string
     }
 
+    if(buf!='\r'){         // save any character except carriage return
       c[i]=buf;               // store new character    
-    
       if(i<max)               // do not store more than max characters (excluding string terminator)
         i++;
+    }
   
   } // while(1)