Quell git warnings about compiled files, make output of the --list-devices command more readable when we have multiple devices inserted.

software/.gitignore

@@ -1 +1,9 @@
-./infnoise
+infnoise
+KeccakF-1600-reference.o
+daemon.o
+healthcheck.o
+infnoise
+infnoise.o
+libinfnoise.a
+libinfnoise.o
+libinfnoise.so

software/libinfnoise.c

@@ -287,7 +287,7 @@ bool listUSBDevices(struct ftdi_context *ftdic, char** message) {
         }
 
         // print to stdout
-        printf("Manufacturer: %s, Description: %s, Serial: %s", manufacturer, description, serial);
+        printf("Manufacturer: %s, Description: %s, Serial: %s\n", manufacturer, description, serial);
         curdev = curdev->next;
     }