CIMI: Initial import of Mock driver for CIMI frontend

[mfojtik]

Hi,

This is just first draft for the Mock driver with CIMI frontend.
The Mock driver will currently only respond to:

curl -H 'Accept:application/xml' \
  "http://localhost:3001/cimi/machine_configurations/m1-small";

if you start the server using:

./bin/deltacloudd --cimi -i mock

You should get both XML and JSON output back in browser.
Remember this is just a draft how the driver code could looks like.

 -- Michal