Added more infos to the README file

Change-Id: I3922a153b1bd665ddec6fc31c3af4ee19c48bff4
Added class and device structs into struct dev_one

Change-Id: I82cd5b5bb9d7906e7a147de47791d3d59170cb36
Encapsulated structs into struct intn_dev

Change-Id: I8050509e99f0fe0baef316970a50a3ef792fe27f