Change-Id: Ie859a8d019e797540c811761e1e92727dc153201

  o Added section for dtb tool

Change-Id: I903e123a2cd96af4c2681e0a7e4cfa2fe6bf4c6b

  o Support for signing efi.bin updated
    - efi.bin can be signed with/without dtb directory
    - Make sure there are not many dtbs files in dtb directory due to
      size problem
  o Support for signing dtb.bin added
  o Updated README.md file
  o Updated typos in config.ini file

Change-Id: I179706a0f44b0a57d09a972f7e5eb019333aa583

Change-Id: Idfb9df6be76f334be8ca8800313befea05d2dc69