Update the readme and rename the flash script

README.md

@@ -4,22 +4,30 @@ Firmware: https://config.qmk.fm/#/xd75/LAYOUT_ortho_5x15
 
 # Flashing the firmware
 
-1. Install the qmk command line tool and all the dependecies. Create a new keymap for your keyboard.
+Install the qmk command line tool and all the dependecies. Create a new keymap for your keyboard.
 
 ```sh
 qmk new-keymap
 ```
 
-2. Generate the json configuration using the online tool.
+Generate the json configuration using the online tool.
 
-3. Download the generated json and convert it to a keymap.c
+## Automatic installation
+
+```sh
+./build-and-flash
+```
+
+## Manual installation
+
+Download the generated json and convert it to a keymap.c
 
 ```sh
 cd ~/your/qmk/repo
 qmk json2c -o keyboards/xd75/keymaps/gdk/keymap.c ~/downloads/gdk.json
 ```
 
-4. Compile and flash the firmware.
+Compile and flash the firmware.
 
 To be able to flash the firmware you must enter the keyboard in the "DFU" state. Don't forget to add a "Reset" binding on your keyboard to be able to flash it easily.