Add a README file for the project

Hello Enric,

This patch adds a README file for the edikit-hw project. 

The following changes since commit 6c475643529f81399c9914ac7ed9ce509f15aef8:

  Add a README file for the project (2013-04-29 08:54:21 +0200)

are available in the git repository at:
  git://github.com/martinezjavier/edikit-hw.git master-dev

Thanks a lot and best regards,
Javier