Update README.md

Adapt code to UHK HW and FW (bl_main.c and shutdown_cleanup.c)
Change vector reset configuration (MK22F51212/src/startup/gcc/startup_MK22F51212.S)
Adapt peripheral configuration and start address of UHK (bootloader_config.h)
Adapt clock configuration to make it compatible with UHK.
Added binaries to test the bootloader.

README.md

@@ -1,3 +1,25 @@
 # Ultimate Hacking Keyboard bootloader
 
 This repository contains the bootloader of the [Ultimate Hacking Keyboard](https://ultimatehackingkeyboard.com/) based on [NXP Kinetis Bootloader](http://www.nxp.com/products/microcontrollers-and-processors/arm-processors/kinetis-cortex-m-mcus/kinetis-symbols-footprints-and-models/kinetis-bootloader:KBOOT) v2.0
+
+The project actually being modified is in KBOOT\targets\MK22F51212\. 
+
+To test the bootloader a binary properly configured has been added to the root folder of this repository. This binary is based on the UHK_Right Firmware project. 
+To understand these modifications and apply them to the current version of the UHK Right firmware, follow the procedure in "Adapting UHK Project to KBOOT.docx" (Work in progress...)
+
+******* FEATURES *******
+
+This bootloader is a fully functional porting of KBOOT 2.0. It supports the full command set from KBOOT 2.0 and the device can be controlled and erased/programmed easily using
+the blhost.exe tool provided by NXP and included in this repository. A GUI with a reduced set of features has also been created for Windows (KinetisFlashTool.exe).
+
+Key features:
+
+ - Communication through HID with any PC without the need of an additional driver.
+ - Automatic timeout and jump to user application without any action from the user.
+ - If no valid application is present, Bootloader will keep waiting for a communication through the HID USB port.
+ - Every command sent to the BL includes a validation process inside the MCU to avoid any error in the communication.
+ - The memory area of the BL is protected, so even if the update fails, user just needs to do a Power on Reset (Plug and Unplug the Keyboard) in order to launch the bootloader again.
+ 
+ Features to be added:
+ - Additional layer of security. Bootloader will not allow any kind of update until a PIN sequence has been introduced.
+