Add README
Add README

Describe code organization in the README.

Change-Id: Iaa180fd5663c9f7fa0eba4778cb2ae7bc936a369
Signed-off-by: Deepak Kodihalli <54105a30055f1e07853b8ee7a2f0d75d22ed98c1@in.ibm.com>

openbmc/pldm,openbmc/pldm,openbmc/pldm