ADD New architecture diagram
Update README.md

Change architecture description.
FIX Architecture diagram
Merge branch 'task/IOTCORE-127_Documentation' of github.com:telefonicaid/fiware-orion-pep into task/IOTCORE-127_Documentation
Update README.md
Update README.md
Update README.md
Update README.md
Update README.md

Update the Rule description and deal with some PR concerns.
Update README.md
Merge pull request #28 from telefonicaid/task/IOTCORE-127_Documentation

Task/iotcore 127 documentation