Release 1.1.8 - Update keypad output and add more keys to RX/TX mode

This release adds the remaining hex C, D, E, and F, for both 4bit and 8bit keypads in RX and TX mode.

Also now pinpad entries have an automatic HEX output in the log file.

```
* = A
# = B
F1 = C
F2 = D
F3 = E
F4 = F
```

Source Code/esprfidtool/version.h

@@ -1,2 +1,2 @@
-String version = "1.1.7";
+String version = "1.1.8";
 String APIversion = "1.0.0";